Designed specifically for use in AR15/M4 firearms like the BANSHEE Mk4, .300 BLK not only provides ballistic performance that rivals its Russian 7.62x39 counterpart, .300 BLK excels in subsonic and suppressed applications above other common calibers as well. Best of all since this BANSHEE is built on the CMMG Mk4 AR15 platform, Customization and upgrades like Drop-In Triggers are only limited by your imagination. Available in a variety of Cerakote finish options, the BANSHEE series represents the most innovative AR pistols and SBRs available today. From the stylized receivers and EML handguards, every BANSHEE is tailor-made to be the personal defense weapon you can always depend on. With full-length M-LOK slots on both sides and the bottom of the handguard as well as M-LOK between the top Picatinny rail sections, youll always have enough space for those must-have accessories. Mk4 ZEROED parts and accessories Quality comes standard. The AR15 platform is well known for its capability for customization but picking the right parts doesnt have to be a nightmare of homework. Every part including the full kit of ZEROED parts and accessories are made here in the USA with quality and attention to detail that is second to none and each BANSHEE comes equipped with a slew of ZEROED parts standard