300 Blackout Barrels

Discover the perfect 7.62×35 mm barrel for your AR build with our selection of 300BLK barrels. Choose various lengths from 7 to 16 inches, plus some available with flutes and different finishes to create your dream barrel. Made from 4150 Chrome Moly Vanadium steel and finished with a corrosion-resistant nitride coating or comes in Stainless Steel, these 300 blackout barrels are built to last. Find the right barrel length and install it on your AR-15 Upper configuration. Shop and Save While Building the Firearm of Your Dreams.