The 5.56mm Kinetic Projectile

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


m193.jpg (1637 bytes)

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)


m855.jpg (1527 bytes)

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)


m856.jpg (1542 bytes)

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)


m200.jpg (1578 bytes)

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)

 

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.

Barrel

Length(in) 

Twist       

Rate

Point Target 

M193(M)

Point Target 

M855(M)

Area Target 

 M855(M)

20

1:7 to 1:9

460                

550                

800                

20

1:12

460

92

N/A

14.5

1:7 to 1:9

460

500

800

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

Barrel Length  (in)

MV M193   (fps)

MV M855   (fps)

Frag M193   (Yd)

Frag M855   (Yd)

20

3259       

3100

135/190

125/190

16

3132

2989

105/160

90/155

14.5

3064

2970

90/145

85/150

11.5

2872

2738

45/95

10/75

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.

 

 

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.

 

 

 

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 

 Chapter

 Page 

 Paragraph 

 Weapon 

 Synopsis

   2

 15

 

 CAR-15

 Description of Howe's rifle

   4

 34

 

 M16A2

 Somali hit by round drops, with gaping hole in his back

   4

 35

 

 "       "

 "  (continuation of the description ) "

   6

 45

 

 M16A2

 150 yard shot fired - threat stopped

   6

 46

 

 Somali

 Takes Ranger's finger off

   6

 47

 

 M16A2

 Above Ranger shoots aggressor in head (it explodes), a few minutes later shoots & kills another

   7

 51

 

 M60

 Saboted SLAP rounds require three 10-12 round bursts to finally stop the aggressor

   7

 52

 

 M16A2

 Waddell shoots a man, target falls over

   7

 53

 

 M16A2

 Yurek picks off a man (status unknown)

   8

 56

 

 CAR15?

 Bray (a PJ) shoots (and drops) a charging militia man

   9

 61

 

 Somali

 Gay (a SEAL) is hit, round breaks his knife but does not penetrate, wound is minor and he gets back to fighting

 12

 72

 

 M2 

 M16A2

 Othic shoots a man with the M2 (tears him apart), mows crowd

 Burns drops an RPG gunner with 1 shot (gunner is wounded)

 12

 73

 

 RPG

 Damages vehicle, severly wounds Wilson

 13

 75

 3

 M16A2

 Galentine describes how much its like shooting on the range - aim COM, squeeze a round and the target drops.

 13

 77

 

 Somali

 Berendsen hit in the arm (injury doens't looke severe, though thumb is hanging off), he continues to fire his M203

 13

 78

 

 M16A2

 Somali

 Diemer shoots a burst at a Somali (who is thrown backward and dies)

Snodgrass was hit (not dire, he didn't scream) continues fighting


Black Hawk Down

 Chapter

 Page

 Paragraph

 Weapon

 Synopsis

   5

   98

 

 M16A2

 Woman shot and drops

   7

 101

    4

 M60

 Two men are shot, they both drop, then one gets up and limps for cover.

 19

 145

 

 AK47

 Carlson shot in knee - he keeps on fighting.

 19

 148

 

 M16A2

7.62x51(1)

 2 men shot twice in chest

 Ranger hit (through armored door) round bounces off boot

 20

 152

 

 Somali

 Ranger hit twice through door, leg bleeds

 20

 153

 

 AK47 (?)

 Driver hit in shoulder - he continues to drive

 20

 154

 

 RPG

 Mortally wounds driver - knocks 2 Rangers out of the cab of the truck.

 20

 156

 

 Somali

 Ranger hit by round knocked to street, then gets patched up and he walks back to his vehicle

 20

 157

 

 CAR-15

 Somali boy (firing AK) hit and knocked off his feet, 3 Somalis shot

(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

 Chapter

 Page

 Paragraph

 Weapon

 Synopsis

   2

 169

 

 Somali

 Fales hit in leg, some muscle pulled out , he hopps back to buddies

   4

 175

 

 M16A2

 Phipps shoots man and he drops into alley - then shoots 2 more

   4

 176

 

 Grenade 

 CAR-15

 Phipps hurt & can't walk, Gould bleeding from buttocks

 D-Boy drops a Somali with a burst to the head

   9

 201

 

 M16A2

 Yurek shoots Somali (who falls forward)

   9

 202

 

 LAW

 M203

 Knocked over machinegun - but didn't dammage it or the crew

 40mm grenade destroyed gun & killed crew

 10

 204

 

 SAW

 Dropped man

 10

 205

 

 SAW

 Shot at man - Nelson deafened by the muzzle blast of the SAW

 11

 207

 

 Somali

 M16A2

 Williamson hit a 2nd time - and now couldn't walk

 Stebbins double taps man in chest, he drops to his knees & slumps over

 11

 212

 

 RPG

 Minor shrapnel to soldiers back (barely bleeds)

 11

 213

 

 Somali

 Goodale takes a round into his leg and out the buttock - he can't walk

 12

 217

 

 AK-47

 M-60

 M203

 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

The Alamo

 Chapter

 Page

 Paragraph

 Weapon

 Synopis

   2

 251

 20

 CAR-15

 Howe complains about M855 firing at moving target 2 blocks away (2)

   4

 262

   9

 11

 SAW

 CAR-15

 Flattens old guy who was drunk or high

 Woman shot

   4

 263

 12

 SAW, M-60, M16A2, & CAR-15, M203

 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)

   7

 272

   1

 SAW

 Floyd hits Somalis who would twitch, take a step or two then fall.

 13

 309

   7

 M16A2

 Ranger shoots 2 Somalis climbing a wall (both are dropped)

 13

 310

   9

 CAR-15

 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)

 13

 311

 15

 CAR-15

 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)

 13

 312

 15

 CAR-15

 D-Boys shoot a second man minutes after the previous one

(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.

 Chapter

 Page

 Paragraph

 Weapon

 Synopsis

   2

 322

 17

 M16A2

 Talked about how he shot a Somali man, who shook as 5, 10, 15 rounds slammed into him

   9

 349

   8

 AK-47?

 Round hits Flashbang on Doc Strous's vest, knocking him down, but he is unhurt.

 

The Fututre:

M993 / M995 Armor Piercing (AP) cartridges

The M995 is a 5.56-mm Armor Piercing (AP) cartridge that provides an AP capability for the M16A2 rifle, the M4 carbine, and the Squad Automatic Weapon (SAW). The M993 is a 7.62-mm AP cartridge which provides an AP capability for the M60 machine gun, and the M24 sniper rifle. These cartridges were designed to augment the fielded version of the ammunition (M855 and M80), which employ a soft lead (or ball) projectile. The M993 and M995 were initiated in 1992 as part of the Soldier Enhancement Program (SEP), and intended to give the soldier an added capability against armored threat vehicles. This capability will support the precision engagement and dominant maneuver force aspects of Joint Vision 2010.

DOT&E activity for these programs involved Live Fire Test and Evaluation (LFT&E) only; no formal operational testing or oversight was involved. The combined LFT&E strategy for these two programs was approved by DOT&E in November 1996, and the detailed test plan (DTP) was approved in December 1996. Previous developmental testing of these two cartridges focused on shots against simple range targets - not against an actual threat vehicle. By combining Joint Live Fire (JLF) assets, namely a BRDM-2 armored personnel carrier, with the Army's funded LFT&E program, a credible full-up systems level lethality live fire program was made possible.

The LFT&E program was conducted in accordance with the approved LFT&E strategy from November 1996 to April 1997. In particular, the Army conducted dedicated live fire tests involving approximately 100 M995/M993 shots against the Russian BRDM-2 armored personnel carrier in April 1997. The armor perforation capability and the potential for crew incapacitation from behind armor effects were assessed. All testing has been completed and the Army's report to DOT&E has been completed.

The M995 and M993 AP cartridges are required to have better penetration capability than the standard M855 and M80 ball rounds, especially improved capability to penetrate lightly armored vehicles at extended ranges. The primary intent is to improve incapacitation against troops within lightly armored vehicles. All available test data indicate that the M995 and M993 meet these requirements, and will be effective in a realistic combat environment.

In the past, small arms lethality live fire programs have not used actual threat vehicles, but have relied on simple armor plates as the targets. In this program, an actual threat vehicle was used, and shown unequivocally that realistic small arms LFT&E can be accomplished using actual threat vehicles at a minimum cost. Had the testing been conducted using simple armor plate targets, it would have been more difficult to assess system performance against the expected threat.

 

Designed by Johnny Salaza,