Uppers BRT Upper Receiver Group AR-15 5.56 NATO AR15, M16, M4 Made in USABRT 8.3" PDW Upper Receiver GroupBRT 8.3" PDW Upper Receiver Group$680.00BRT 10.3" Govt Upper Receiver GroupBRT 10.3" Govt Upper Receiver Group$685.00BRT 11.5" Govt Upper Receiver GroupBRT 11.5" Govt Upper Receiver Group$685.00BRT 16" Govt Upper Receiver GroupBRT 16" Govt Upper Receiver Group$695.00BRT 11.5" OPTIMUM Upper Receiver GroupBRT 11.5" OPTIMUM Upper Receiver Group$710.00BRT 12.5" OPTIMUM Upper Receiver GroupBRT 12.5" OPTIMUM Upper Receiver Group$715.00BRT 13.9" OPTIMUM Upper Receiver GroupBRT 13.9" OPTIMUM Upper Receiver Group$725.00BRT 14.5" OPTIMUM Upper Receiver GroupBRT 14.5" OPTIMUM Upper Receiver Group$725.00BRT 16" OPTIMUM Upper Receiver GroupBRT 16" OPTIMUM Upper Receiver Group$725.00BRT CUSTOM Upper Receiver GroupBRT CUSTOM Upper Receiver Group$200.00