The BANSHEE Mk4 .300 BLK has been meticulously engineered for AR15/M4 firearms. Its ballistic performance competes admirably with its Russian 7.62x39 counterpart while surpassing other common calibers in subsonic and suppressed settings. The BANSHEE Mk4, part of the celebrated CMMG Mk4 AR15 series, allows limitless customization possibilities including easy Drop-In Trigger upgrades. BANSHEE\'s innovation shines in its series of AR pistols and SBRs, providing an unrivaled personal defense weapon. Notable features include the quick deployable RIPBRAC, stylish receivers, and EML handguards. Additionally, the BANSHEE has ample room for desired accessories, thanks to full-length M-LO slots on both sides, bottom of the handguard, and between top Picatinny rail sections.Sizes and specifications include: Platform - Mk4, Caliber - .300 BLK, Operating System - Direct Impingement, Barrel Length - 12.5\