AlphaOps AR-15 M4 Barrel Nut - Mil-Spec Product Description The AlphaOps 5.56 / .223 barrel nut is a perfect fit for ... Model : AO_Barrel_Nut Manufacturer : AlphaOps $8.95

AlphaOps Mil-Spec AR-15 M4 556 Charging Handle Product Description The AlphaOps 5.56 / .223 charging handle is a perfect fit... Model : AO_CH_556 Manufacturer : AlphaOps $14.95

AR-15 M4 M16 Firing Pin - Full Auto Rated Product Description Mil-spec, original-style, chrome plated M4 Ar-15 firing p... Model : ar15misc_firingpin Manufacturer : AlphaOps $12.95