The BCM RECCE-11 MCMR Pistol has a chrome lined bore and chamber, USGI barrel profile and a carbine length gas system. Features: M4 feed ramp barrel extension M4 feed ramp flat top receiver T-marked upper receivers Government profile barrels Independently certified Mil-Spec 11595E barrel steel Chrome lined bore and chamber Manganese phosphate barrel finish on entire barrel Bolt machined from Mil-Spec carpenter No. 158 steel HPT bolt (high pressure tested/proof) MPI bolt (magnetic particle inspected) Shot peened bolt Chrome lined carrier (auto) Chrome lined gas key Gas key hardened to USGI specifications Grade 8 hardened fasteners key Staked per Mil-Spec Tool steel extractor Black extractor insert Receivers machined from aluminum forgings 7075-T6 Receivers hardcoat anodized per MIL-A-8625F, type III, Class 2, Staked M4 lock nut, USGI H puffer (1 USGI tungsten, 2 steel), low shelf for RDIAS installation, low shelf for accuwedge use, fire controls marked SAFE and SEMI