BCA’s 450/458/12.7 stripped flat top upper receiver is a perfect start for your 450/458 AR build, This upper receiver is the perfect foundation. Made from 7075 aircraft aluminum to mil-spec. These anodized forged uppers will stand up to the abuse these rifles are known to take. This upper does not include forward assist and dust cover.
SPIKE'S TACTICAL PHU JOKER LOWER RECEIVER
$1,500.99 
KAK Complete AR15 Upper Receiver - 9mm - 4" Barrel - 2.9" MLOK
$414.95 
BCA AR-15 Rear Charging 450/458/12.7 Stripped Upper Receiver
$113.99 
