Bravo Company manufacturing has gained quite a cult-like following due to the fact that BCM takes quality control to a new level. BCM is known for strict tolerances and extremely high-quality control to ensure the products they make can be trusted in the field under any circumstance. This particular AR-15 complete lower receiver features a pistol BCM Mil-Spec receiver extension and is perfect for your next AR-15 build. Features: Receivers machined from aluminum forgings 7075-T6Receivers hardcoat anodized per MIL-A-8625F, Type III, Class 2Staked M4 lock nutUSGI H buffer (1 USGI tungsten, 2 steel)Low shelf for RDIAS installationLow shelf for accuwedge useFire controls marked safe and semiBCM QD sling mount end plate