“2 Vets Arms 2VA300BLK Blackout 300 SA300 AAC Blkout 16″” 30+1 Magpul CTR Stk Blk The Blackout 300 comes with a 16″” 416R stainless, free-floated barrel and a low-profile gas block with a carbine-length gas system. It features a carbine-length, free-float quad rail, and a side-charged upper receiver with Magpul furniture. “