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New Frontier Armory
Gen 2 .45 ACP Complete Upper Receiver, Rear Charging
+ 2 reviews
As low as$372.99 -
New Frontier Armory
5.56mm Complete Forged Upper Receiver, Rear Charging
+ 1 reviews
As low as$324.99 -
New Frontier Armory
5.56mm Gen 2 Complete Billet Upper Receiver, Rear Charging
+ 2 reviews
As low as$374.99 -
New Frontier Armory
Gen 2 .40 S&W Complete Upper Receiver, Rear Charging
+ 2 reviews
As low as$372.99 -