1) muzzle flash
2) short range
3) possibility of jamming. Some have said that using the heavier 77 grain bullet helped with function. And others have mentioned some function problems have been overcome. This is not a gun I would own!
1) The overall gun length is the same as the gun with a 14.5 inch barrel.
2) slightly longer accurate range
3) Overall gun barrel is the same length using a thread protector and the muzzle brake can be legally screwed on and taken off of the gun and can be switched unlike the 14.5 inch barrel.
D) 18 inch barrel- Not one of the more popular AR barrels two inches shorter than the 20 inch barrel and though offering grater range; when a muzzle brake is screwed on the gun barrel it will be about 20 inches. so why not own a 20 inch barrel and take advantage of the longer range and muzzle velocity. The gun is beginning to sacrifice some of its close quarter’s ability.
Richard W. Norman author of American Handbook on Guns Ammo and Freedom