Matched flattop upper and lower receiver have been machined from 7075 T6 aluminum billet to strict tolerances so they accept internal parts for standard mil-spec AR-15 receivers. Integral triggerguard machined right into the lower and extra metal at stress points add exceptional strength and structural rigidity. Includes provisions for forward assist and ejection port cover as well as engraved pictogram markings for safety position. Ceramic coating gives excellent wear and corrosion protection while the unique skull-pattern graphic makes your rifle look unlike any other on the firing line! Mfg: Black Rain Ordnance Inc. SPECS: Machined 7075 T6 aluminum ceramic coated matte black-and-white skull pattern finish. .250" pivot/takedown pin holes. .154" hammer/trigger pin holes. No internal parts included. FFL required for purchase.