The Gamma 556SL is long enough to provide an overall length of 16" when permanently affixed to the barrel. Its outside diameter of .745 inches allows you to install and service your gas system without removing the muzzle brake. The 3-chamber design looks great on any standard profile barrel while effectively eliminating recoil leaving your rifle shooting flat and soft. Made in the USA.
Specifications:

Type
Model	GAMMA
Dimensions
Size
Material	17-4 Stainless Steel
Action
Trigger
Safety
Thread Pattern	1/2"-28 tpi
Finish	Nitride
Bolt Type
Hand
Hammer Type
Capacity