The Bootleg Full Auto Bolt Carrier Group is a Mil-Spec, nitride treated bolt carrier group that will drop in to any quality AR15 upper receiver. All specs, materials and protocols of Mil-Spec are met with the Bootleg BCG. This BCG is made from 4140 steel which has been proven to be a reliable good quality steel. The bolt assembly has been phosphate coated. The carrier is made to be the M16 profile which has without a doubt been proven to work under a wide variety of conditions.

• Machined from 4140 steel

• Full auto rated

• Completely Mil-Spec

• Nitride treated

• Staked Mil-Spec gas key

• 5.56 phosphate bolt assembly