atlas 5.56 adjustable muzzle
I followed the instructions removed and installed the atlas adjustable muzzle (very easy) and took off for the firing range. Right off the bat the muzzle worker great. I saw no need to enlarge the little hole on the top of the muzzle break, however, my AR-15 has a 18in" heavy barrel on it. This could change if you are using a lighter barrel, but, even at that, drilling a little larger hole is "no big deal". I'm fixing to order another for my wife's AR-15 Great muzzle break. Bill Lawton, Picayune, MS.
Reviewed by: (Verified Buyer) William Lawton from picayune, ms. on 10/17/2016