Cobalt Kinetics CKPROSET13BLK CK-Pro Rcvr Set 13 Black,Rcvr Sets

Timber Creek Outdoors TCO Enforcer Upper Parts Kit for AR-15, Purple Anodized - E UPK PPA

Timber Creek Outdoors TCO Enforcer Complete Build Kit for AR-15, Robin's Egg Blue - TCO EK RE

Timber Creek Outdoors AR Lower Parts Kit for AR-15, Robin's Egg Blue - AR LPK RE

Cobalt Kinetics CKPROSET675BLK CK-Pro Receiver Set 6.75" Black

Radian Weapons Model 1 10" Upper Receiver and Handguard Set, Flat Dark Earth

Timber Creek Outdoors TCO Enforcer Upper Parts Kit for AR-15, Red - E UPK R

Timber Creek Outdoors TCO Enforcer Upper Parts Kit for AR-15, Blue - E UPK B