The Vortex Flash Hider made for AR-15 type rifles weighs 3 ounces, is 2.25 inches in length and does not require a lock washer for attachment to the barrel of an AR-15. The use of a lock washer or crush washer was rejected as their use can increase visible flash from the shooter's perspective. The Vortex is tightened by hand and repeated firing of the rifle causes the Vortex to tighten to the barrel.
