**BLEM** AR15 NICKEL BORON COMPLETE UPPER RECEIVER ... ASSEMBLIES INSTALLED; WILL FIT ON ANY MIL-SPEC LOWER RECEIVER WITH .250".... I initially bought a BCM upper receiver and upon inspection it was an obvious blem with discoloration and rub marks. BCM is supposed to have some of the best.... AR-STONER AR-15 Side Charging Pistol Upper Receiver Assembly 223 Remington (Wylde) 7.5" Barrel with 7" M-Lok Handguard. 5. Rated 5 out of 5 stars. 67a84bf851 heecha
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