This lower receiver displays the inspired design of a pirate like skull carved and shaped into the magazine well with great detail. Milled from strong 7075-T6 aluminum it has bullet pictogram selector markings on both sides. Multi caliber marked, this lower is ready for your .223/5.56, 6.5 Grendel or .300 AAC Blackout build. It features a heavily flared magwell with an oversized integrated trigger guard and accepts any standard AR15 pattern magazine including GI and PMAGS.