M855A1
5.56x45mm M855A1
Updated Nov 3, 2026, 12:30 PM
A 5.56x45mm NATO M855A1 cartridge with a 4 gram armor-piercing bullet with a steel penetrator tip over a copper alloy core with a copper semi-jacket in a brass case. This cartridge was designed to improve the penetration capabilities of the 5.56x45mm NATO M855 cartridge of the United States Army, being able to pierce basic and intermediate body ballistic protections, however, due to its design, it has a high bounce probability on various surfaces.
Flea market
Not eligible for the flea market.
- Min flea level
- 0
- Low (24h)
- Not eligible
- Offers
- Not eligible
Categories
Sell to traders
Properties
- Caliber
- 556×45 NATO
- Damage
- 49
- Armor damage
- 47
- Penetration power
- 44
- Accuracy modifier
- -0.05
- Ammo type
- bullet
- Ballistic coefficient
- 0.233
- Bullet diameter
- 5.7 mm
- Bullet mass
- 4 g
- Durability burn factor
- 1.34
- Failure To Feed Chance
- 9.4%
- Fragmentation chance
- 44.0%
- Heat factor
- 1.71
- Heavy bleed modifier
- 0
- Initial speed
- 945
- Light bleed modifier
- 0
- Misfire Chance
- 17.5%
- Penetration Chance
- 55.0%
- Penetration deviation
- 1.375
- Projectiles
- 1
- Recoil modifier
- 0.05
- Ricochet Chance
- 38.0%
- Stack size
- 80
- Stamina burn per damage
- 0.144
- Tracer
- No
- Tracer color
- red