The 8.6 Blackout is a next generation AR-15 compatible cartridge engineered for exceptional suppressed performance. Delivering hard hitting .338 caliber projectiles at subsonic velocities from a standard AR-15 lower. At Daytona Tactical, we carry 8.6 Blackout barrels and components from trusted brands for shooters who want the ultimate suppressed AR-15 build. Browse our in stock selection at competitive prices with fast USA shipping.