Either mil spec upper receiver or upgraded billet upper receiver (depending on availability)Forward assist (where applicable)Dust cover (where applicable)7.5 chromoly vandium 5.56 NATO or 223 wylde barrel (both will shoot 5.56 ammo)Pistol length gas tube.750 steel gas blockA2 flash hider7 Free float handguard (handguard may change depending on availability) please request mlok or keymod in comments section and we will try to accommodate you.Ambidextrous charging handleFull auto nitride bolt carrier groupUSA made lower parts kitPistol buffer kit may or may not have foam depending on availability
