5.56x45mm MK 255 Mod 0 (RRLP)

A 5.56x45mm NATO MK 255 Mod 0 (RRLP) cartridge with a 4 gram bullet with a copper/polymer composite core with a copper jacket, in a brass case. This cartridge was designed under the name of RRLP (Reduced Ricochet Limited Penetration) in order to substantially reduce collateral damage from ricochets and over-piercing during training and close-quarters operations, as well as providing a significant stopping power effect.