Building off the lessons of its older brother 300 BLK, the 8.6 BLK cartridge brings harder hitting terminal ballistics without the need for full-size rifle length barrels thanks to its .338 caliber projectile and blazing quick 1:3 barrel twist.Whether it& quiet performance with suppressed subsonic rounds you want or supersonic loads for maximum reach at further ranges, 8.6 BLK is the perfect modern day medium-to-large game round.The Modern Utility Rifle for Restricted StatesThe Br3 is here to answer the call, bringing traditional controls and furniture together with modern engineering to be the go-to platform for those in heavily restricted states. The Br3 is designed to use Remington 870 compatible stocks, and can accept all Mk3 compatible DISSENT upper groups.Adjustable Gas BlockIf you're looking to shoot suppressed or just fine tune your DISSENT to your preferred ammo, the adjustable gas block gives you the freedom to dial in the gas system exactly to your liking. Never too much and never too little.Lifetime Quality GuaranteeWe aim to please, that's why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.~Firearms shipping to states with magazine capacity restrictions will only ship with 10rd magazines in place of standard capacity magazines. CMMG does not address any other state compliancy requirements for further restricted states.