DeadShot Barrels, a premium botique barrel co, that actually makes aerospace equipment n they do barrels on the side..24" spiral fluted with rifle length gas tube (included) and gas block with underside indent for proper alignment..and a muzzle brake which they manufacture I believe...Cerakoted in melonite black semi gloss finish..looks sharp! I've got a Grendel barrel from them and it shoots lights out..this is unfired! These run near bouts 500$ for quick sale 350$ PayPal FF prefered...