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Small Caliber Ammunition – 5.56mm
Alliant
Lake City Small Caliber Ammunition Company is the Sole Source
Provider to the U.S. Department of Defense for Small Caliber
Ammunition
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M193
Cartridge, 5.56mm, BALL. Unpainted bullet tip. For use
against personnel and unarmored targets.
U.S. Designation
M193
Synonyms
5.56 Ball, .223 Armalite, .223 Remington Special, 5.56 x
45mm
Interoperable
Suitable for use in most weapons with a 1-in-12 barrel twist
(one turn in 305mm). Rifles, 5.56mm—M16 and M16A1, M16A2,
AR15, H&K, Galil, Ruger, FN, SIG, and other compatible
systems.
NSN
1305009263970
1305012556276 (10-Round Clip)
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M855
Cartridge, 5.56mm, BALL. Green bullet tip. For use against
personnel and light armored targets.
U.S. Designation
M855
Synonyms
5.56 Penetrator, 5.56 x 45mm
Interoperable
Machine Gun, 5.56mm—M249. Rifles, 5.56mm—M16A2, H&K.
Suitable for use in most weapons with a 1-in-7 barrel twist
NSN
1305011555459
1305012588692 (Linked)
1305012520153 (4 Ball M855, 1 Tracer M856, Linked)
1305014574590 (Commercial Pack)
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M856
Cartridge, 5.56mm, TRACER. Orange bullet tip. Permits
observation of the bullet’s trajectory to the point of
impact.
U.S. Designation
M856
Synonyms
Penetrator Tracer for M855
Interoperable
Machine Gun, 5.56mm—M249. Rifles, 5.56mm—M16A2, H&K.
Suitable for use in most weapons with a 1-in-7 barrel twist.
NSN
1305014574589
1305011555457 (Linked)
1305012520153 (4 Ball M855, 1 Tracer M856, Linked)
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M200
Cartridge, 5.56mm, BLANK. Rose-petal closure of cartridge
case mouth. For simulated firing.
U.S. Designation
M200
Synonyms
Blank Training Cartridge
Interoperable
Rifles, 5.56mm—M16, M16A1, M16A2, and other compatible
systems.
NSN
1305012588695 (Linked)
1305001823217 (Carton)
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AR15/M16 Rifle Performance (5.56mm)
Maximum
Effective Ranges
Since many people ask how far can you
shoot with an AR-15, I present this table of data courtesy of the U.S.
Army. As you can see the 600-800M markings on the rifle are intended
for area targets, rather than shooting at a singe target. The table
is based in military rifles with chrome lined bores shooting mil-spec
ammo. It does not apply to match rifles with match ammo.
M193 : 55gr FMJBT (BC = .243)
round used by US forces in the M16A1.
M855: 62gr FMJBT (BC = .304),
penetrator tip, NATO round used in M16A2.
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Barrel
Length(in)
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Twist
Rate
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Point Target
M193(M)
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Point Target
M855(M)
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Area Target
M855(M)
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20
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1:7 to 1:9
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460
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550
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800
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20
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1:12
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460
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92
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N/A
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14.5
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1:7 to 1:9
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460
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500
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800
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FYI: Point targets represent targets that are 19.5" wide and
40" high. Area targets represent military formations in the
open. Match rifles often win 600yard service rifle competitions
using 75gr bullets, and using 80gr bullets can shoot point targets to
1000M. Range is not really based on twist rate but rather the round
(M855 or M193) you use. Rifles with 1:12 twist rates are restricted
to the lighter 55gr M193 (M855 will pattern 20" at 92M, often
keyholing). Rifles using 1:7 or 1:9 twists can use the heavier 62gr
M855 rounds as well as M193.
Max range of M855 (62gr) is 3600M; max range of M193 is 2653M.
Barrel
Length vs. Velocity & Fragmentation
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Barrel Length (in)
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MV M193 (fps)
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MV M855 (fps)
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Frag M193 (Yd)
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Frag M855 (Yd)
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20
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3259
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3100
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135/190
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125/190
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16
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3132
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2989
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105/160
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90/155
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14.5
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3064
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2970
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90/145
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85/150
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11.5
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2872
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2738
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45/95
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10/75
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MV: Muzzle Velocity (feet per second).
Frag: Maximum range, in yards, for rounds to fragment. First
value is the range bullets are at 2700 fps, the second value is the range
where the bullet is at 2500 fps. Fragmentation ranges assume 59.6
degrees Fahrenheit (and 29.92 "/Hg), higher tempertures will extend
the ranges slightly.
FYI: To reliably fragment, military FMJ rounds must have a velocity of
2700fps; with velocities under 2500fps rounds will not fragment.
Fragmentation is the reason the 5.56 round is so effective.
Rate of Fire
Maximum rate of aimed semiautomatic
fire is 45 rounds/minute.
Sustained rate of fire is 12 to 15
rounds per minute. At this rate the barrel will never overheat
to the point rounds are able to 'cook off' (rounds fire due to the
heat of the chamber - an uncontrolled 'full auto' kind of effect).
To 'Cook Off' you would need to fire
off 140 round in full auto (or VERY quickly in semi-auto). This
'Cook Off' point is for A1, A2, or M4 profile barrels (HBARS would take
more rounds). At this point you have a DANGER of 'Cook Off', but it
is not guaranteed.
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A portion of the F.B.I. study:
EVALUATION OF THE 5.56MM/.223 CALIBER
ROUND
FOR CLOSE QUARTER BATTLE (CQB)
SWAT MATTER
EXECUTIVE SUMMARY
The Special operations and Research unit (SOARU), as a client/customer of
the Firearms Training Unit (FTU), requested that penetration tests of
various types of 5.56mm/.223 caliber rifle ammunition, in full-metal
jacket (FMJ) hollow-point (HP) and soft-point (SP) configurations be
conducted by FTU's ballistic research personnel. SOARU wanted to determine
if the type of rounds set forth above penetrated more or less through
obstacles/barriers commonly encountered in urban CQB environments and in
unprotected gelatin than
current FBI pistol service HP ammunition.
In addition to the penetration concerns, SOARU, in concert with the FTU,
ultimately desires to provide FBI SWAT teams with the most effective and
reliable small arms weapons systems available and at the lowest cost
possible. Because of the contemporary climate of fiscal austerity, it is
incumbent upon those responsible for weapons and ammunition research and
recommending large monetary expenditures that this vital process is as
thorough and correct as possible.
The FTU completed this exemplary and unique study during 5/93. The rifle
and submachine gun (SMG) fired pistol rounds were subjected to 13 test
events and it was determined, with exception of FBI soft body armor, that
each rifle round expended penetrated less on average than our 9mm and 10mm
service loads. (See ballistic chart page 13.)
Although the FTU disagrees, these results indicated to the SOARU that the
M-16 rifle/carbine with FMJ ammunition could be employed on urban raids
and in other congested CQB scenarios with relative safety where potential
bullet overpenetration was a concern. However, the ability to defeat
ballistic garments, helmets, and all but the heaviest shields is
considered by SWAT to be a "double-edged sword.,, Although rare, but
currently increasing, the criminal use of body armor requires the FBI to
possess some type of armor piercing capability. However, this same
tactical countermeasure will also neutralize current FBI vests, unless
vital areas are protected by ballistic plates. Therefore, great care must
be exercised in planning and observing fields of fire during training and
operations with the M-16 rifle/carbine.
It should also be noted, that FBI and other tactical law enforcement
personnel have recently been confronted; by numerous subjects armed with
rifle caliber shoulder weapons. It is both necessary and logical that FBI
Agents would select weapons at least equal to or exceeding the
capabilities of potential adversaries, so that law enforcement can
dominate the situation.
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Black
Hawk Down
Weapon References
by Chad
Anderson & Forest Platt
After the last rash of BHD (Black Hawk Down) crap
I went out and bought the paperback copy just so I could mark every
instance of ballistic info given that opposed it. I went through and
marked every case where 5.56 did the job, 7.62
didn't, grenades didn't, or rockets
didn't. When I say "did the job" I mean that the
threat was stopped. Not neccessarily one shot stops, but cases where
one round or one burst of 5.56 stopped the threat. On the other hand
the failures to stop are cases where TFR/Delta guys were hit by whatever
(I don't think the SNA was using many M16s [Editor's Note there was
one mentiond in use by the SNA]) and kept on fighting. Lots of
people like to say that BHD showed the inability of the 5.56 to stop while
proving the mighty 7.62 kills 'em all, but forget that only 12 Americans
out of over 100 escaped without being hit by something during the battle.
Since they were hit by Somali fire that would indicate a large number of
7.62 wounds along with grenade and rocket frags and probably the
occasional 5.56 or other weird round from whatever a Sammy picked up.
Since you seem to have a
similar interest, here are the pages that mention something of the above,
with some having multiple info. These page numbers are from the Signet
paperback version:
(Note: the Somalis were using a variety of
weapons most notably the AK-47/AKM in 7.62x39, 7.62 NATO rifles like the
FAL & G3, there were a couple of M16s mentioned. If
the weapon was not known I just marked the entry as 'Somali'.
Entries in RED indicate
a perceived failure to incapacitate by the 5.56.)
Notes on weapons mentioned:
- CAR-15 - a
5.56x45mm carbine firing M855 (unknown if it had an 11.5" or
14.5" barrel - possibly the 14.5" pencil barreled M16A2
Carbine #651 sold by Colt at the time rather than the M4),
used by D-Boys an possibly the PJs
- M16A2 - a
5.56x45mm rifle firing M855 (green tip), used by the Rangers
- SAW - a
5.56x45mm light machine gun firing M855, used by the Rangers
- M-60 - the
US 7.62x51mm light maching gun firing either M80 ball or SLAP (armor
piercing)
- AK-47 - a
7.62x39 rifle firing M43 ball (probably there were no AK-74s which
shoot 5.45x39)
- LAW - a
disposable anti-tank rocket used by US troops.
- RPG - a
handheld rocket launcher that can fire anti-tank or anti-personel
rockets, used by Somalis.
- M203 - a 40mm
grenade launcher that is fitted under the barrel of an M16A2, used by
US Troops
- M2 - the
US .50 BMG heavy machine gun that is usually vehicle mounted, very
powerful.
The
Assault
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Chapter
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Page
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Paragraph
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Weapon
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Synopsis
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2
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15
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CAR-15
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Description of Howe's rifle
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4
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34
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M16A2
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Somali hit by round drops, with gaping
hole in his back
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4
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35
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"
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" (continuation of the
description ) "
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6
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45
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M16A2
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150 yard shot fired - threat stopped
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6
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46
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Somali
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Takes Ranger's finger off
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6
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47
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M16A2
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Above Ranger shoots aggressor in head
(it explodes), a few minutes later shoots & kills another
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7
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51
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M60
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Saboted SLAP rounds require three 10-12
round bursts to finally stop the aggressor
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7
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52
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M16A2
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Waddell shoots a man, target falls over
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7
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53
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M16A2
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Yurek picks off a man (status unknown)
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8
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56
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CAR15?
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Bray (a PJ) shoots (and drops) a
charging militia man
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9
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61
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Somali
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Gay (a SEAL) is hit, round breaks his
knife but does not penetrate, wound is minor and he gets back to
fighting
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12
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72
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M2
M16A2
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Othic shoots a man with the M2 (tears him apart), mows
crowd
Burns drops an RPG gunner with 1 shot (gunner is wounded)
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12
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73
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RPG
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Damages vehicle, severly wounds Wilson
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13
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75
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3
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M16A2
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Galentine describes how much its like
shooting on the range - aim COM, squeeze a round and the target
drops.
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13
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77
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Somali
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Berendsen hit in the arm (injury
doens't looke severe, though thumb is hanging off), he continues
to fire his M203
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13
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78
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M16A2
Somali
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Diemer shoots a burst at a Somali (who is thrown backward
and dies)
Snodgrass was hit (not dire, he didn't scream) continues
fighting
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Black Hawk Down
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Chapter
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Page
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Paragraph
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Weapon
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Synopsis
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5
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98
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M16A2
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Woman shot and drops
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7
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101
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4
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M60
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Two men are shot, they both drop, then
one gets up and limps for cover.
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19
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145
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AK47
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Carlson shot in knee - he keeps on
fighting.
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19
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148
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M16A2
7.62x51(1)
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2 men shot twice in chest
Ranger hit (through armored door) round bounces off boot
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20
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152
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Somali
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Ranger hit twice through door, leg bleeds
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20
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153
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AK47 (?)
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Driver hit in shoulder - he continues to
drive
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20
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154
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RPG
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Mortally wounds driver - knocks 2 Rangers
out of the cab of the truck.
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20
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156
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Somali
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Ranger hit by round knocked to street,
then gets patched up and he walks back to his vehicle
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20
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157
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CAR-15
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Somali boy (firing AK) hit and knocked
off his feet, 3 Somalis shot
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(1) it may
to be 7.62x51 (NATO) or a similar round, as the doors were supposed to
stop 7.62x39 used by the AK47 (then again it could have been a bad armor
panel).
Overrun
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Chapter
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Page
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Paragraph
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Weapon
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Synopsis
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2
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169
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Somali
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Fales hit in leg, some muscle pulled
out , he hopps back to buddies
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4
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175
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M16A2
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Phipps shoots man and he drops into
alley - then shoots 2 more
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4
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176
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Grenade
CAR-15
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Phipps hurt & can't walk, Gould bleeding from
buttocks
D-Boy drops a Somali with a burst to the head
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9
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201
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M16A2
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Yurek shoots Somali (who falls forward)
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9
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202
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LAW
M203
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Knocked over machinegun - but didn't dammage it or the
crew
40mm grenade destroyed gun & killed crew
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10
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204
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SAW
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Dropped man
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10
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205
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SAW
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Shot at man - Nelson deafened by the
muzzle blast of the SAW
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11
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207
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Somali
M16A2
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Williamson hit a 2nd time - and now couldn't walk
Stebbins double taps man in chest, he drops to his knees
& slumps over
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11
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212
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RPG
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Minor shrapnel to soldiers back (barely
bleeds)
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11
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213
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Somali
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Goodale takes a round into his leg and
out the buttock - he can't walk
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12
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217
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AK-47
M-60
M203
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Ranger (really probably a D-Boy) shot in head, 2nd is
shot in neck
Tears off half a Somali milita man
Minor shrapnel dammage to Somali, he walks to medical
care
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The
Alamo
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Chapter
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Page
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Paragraph
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Weapon
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Synopis
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2
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251
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20
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CAR-15
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Howe
complains about M855 firing at moving target 2 blocks away (2)
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4
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262
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9
11
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SAW
CAR-15
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Flattens old guy who was drunk or high
Woman shot
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4
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263
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12
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SAW,
M-60, M16A2, & CAR-15, M203
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Multiple
hits on "Powerfully Built" woman, rounds shred her but
she keeps on going. A 40mm grenade takes off her leg, but it
takes more concentrated fire to stop her. (3)
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7
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272
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1
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SAW
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Floyd hits Somalis who would twitch,
take a step or two then fall.
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13
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309
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7
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M16A2
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Ranger shoots 2 Somalis climbing a wall
(both are dropped)
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13
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310
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9
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CAR-15
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2 D-boys shoot 1 man - he drops dead,
then shoot at a group of 5 others wounding them (they dragged
themselves back up the street)
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13
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311
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15
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CAR-15
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D-Boy shoots a man in the lower right
back - he was spun around with a startled look - then 4 more
rounds hit him and knocked him flat (4)
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13
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312
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15
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CAR-15
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D-Boys shoot a second man minutes after
the previous one
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(2) Note
this is the first time a complaint about the M855 is mentioned. SSG
Howe is shooting at moving targets 2 blocks away. Well over the
50-100 yard 'fragmentation' range of the M855 out of a 14.5" barrel
(when the round is most effective).
(3) It
mentions that many of the troops were firing and trying to stop her.
Even with concentrated fire (including a 40mm grenade) this determined
individual pressed on. So are 40mm HEDP rounds underpowered too?
(4) Howe
was 'disgusted' that it took so many rounds to 'drop the man' (his 2nd
complaint). I find this strange since the first round spun the
Somali around, then the second wave of rounds hit. Sounds like there
was no time for the guy to drop before the 4 later rounds hit him.
Almost like 1 guy in the unit fired - then the rest did a split second
later. I certainly can't see it as a failure.
N.S.D.Q.
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Chapter
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Page
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Paragraph
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Weapon
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Synopsis
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2
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322
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17
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M16A2
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Talked about how he shot a Somali man, who
shook as 5, 10, 15 rounds slammed into him
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9
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349
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8
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AK-47?
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Round hits Flashbang on Doc Strous's vest, knocking him
down, but he is unhurt.
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