Carrier is M16 style Machined from 8620 tool steel Heat treated to military specifications. Bolt is Machined from 9310 tool steel Heat treated to military specifications Shot Peened Ground to meet military required tolerances and MPI (Mag Particle Inspected). Gas key is Machined from 4140 and Heat treated. The entire bolt carrier group is QPQ nitrided. Gives the BCG a nice hard deep black finish. Nitride also aids in lubricity and longer life. The action of your AR will be extremely smooth using our BCG. This carrier is top of the line and we are proud to offer it for sale at Standard Manufacturing Co LLC.
MADE IN THE USA