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.  Buffer detent slightly back too far, so buffer may show wear after use (will not affect function).  Factory BLEM.  BLEMISHED, sold As-Is NO RETURNS. 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.