Aero Precision Complete, Aero Aprh100019 5.56 Bcg Phosphate MB 6061 hard-coat body with a

6061 hard-coat body with a steel stud

L-shape brackets

Fits riser holes from 1/4" to 1/2"

embedded carbon and conditioning the bore to help prevent future build-up

Entering the transom 6" above the water line

Aero Precision Complete, Aero Aprh100019 5.56 Bcg Phosphate MB 6061 hard-coat body with aThis bolt carrier is a valuable addition to your ar15 build. It features a mil spec phosphate coating, properly staked gas key with a chrome lined gas key and firing pin channel, a black o ring insert on the extractor and is made of steel. Finish: Black Phosphate Type: Bolt Carrier Group Model: Complete Size: 223 Remington 5. 56 NATO Material: Steel