PRIMARY WEAPONS SYSTEMS MK216 Mod 1-M .308 Match Upper Receiver (18-M216UC0B)

PWS long stroke piston operating system3-setting adjustable gas systemForged upper receiverIncluded forward assistTriad556 compensatorMLOK free float handguard1:8 barrel twist rate<

PWS long stroke piston operating system3-setting adjustable gas systemForged upper receiverIncluded forward assistFSC556 compensatorMLOK free float handguard1:8 barrel twist rat

PWS long stroke piston operating system3-setting adjustable gas systemForged upper receiverIncluded forward assistTriad556 compensatorMLOK free float handguard1:10 barrel twist rate

PWS long stroke piston operating system3-setting adjustable gas systemForged upper receiverEliminated forward assistFSC556 compensatorPicLok free float handguard1:8 barrel twist rat

Permanently attaches to baseSquare recoil control key for positive engagement of ring to baseRings securely mount around scope using 4 Torx style T-15 socket cap screws, 25 in/lb. of torque...