Add to Cart Quick view wishlist Compare 556 10.3 INCH FSB Crane Spec PUA $299.00 10.3 MK18 (Crane Spec) PARTIAL UPPER ASSEMBLY Our 10.3" Crane Spec complete upper receiver features the ideal gas port sizing (.070) to achieve minimal gas blowback when ran suppressed. This unit is specifically designed to be... Add to Cart Quick view wishlist Compare
