BFSIII® Built Lower Receiver Bushmaster Model XM15-E2S Stripped Lower Receiver, hammer forged from high quality 7075-T6 aluminum to military specifications with a hard coated anodized matte black finish - Pistol Grip - Six Position Collapsible Stock  - Binary Trigger  -The BFSIII® is a three-position trigger, allowing the third position to fire one round on pull and one on release.  BFSIII® is NOT for civilian sales in CA, DC, IA, NJ, NY, HI, DE, RI, FL, MD, CT, or WA. Made In the U.S.A.