Quick view Alexander Arms Alexander Arms Complete Upper Assembly, Alex Ust-17 17hmr Upper $770.29 17 hmr ar-15 upper features: 18" barrel, 1:9 twist rate, 1/2-28rh threading, a2 flash hider included, blowback operating system, black color (optional cerakote upgrades below), two 10-round magazines, parts kit for lower conversion included, weight of... Compare Add to Cart
