Description The Aero Precision VG6 Gamma 556SL is a muzzle brake engineered for pinned and welded AR-15 builds. It is long enough to provide an overall length of 16 inches when permanently affixed to a barrel, and its .745 inch outside diameter allows servicing of the gas system without removing the muzzle device. The three-chamber design is intended to control impulse and leave the rifle shooting flat and soft while fitting standard profile barrels. Constructed from 17-4 stainless steel with a black nitride finish, it combines durability with a service-friendly profile. Key Specifications The model is GAMMA 556 SL. The thread pattern is 1/2-28 tpi. The caliber designation is .223 REM/5.56 NATO. The material is 17-4 Stainless Steel. The finish is Nitride. The color is Black. The overall length when permanently affixed is 16 inches. The outside diameter is .745 inches. The device features a 3-chamber design. Manufacturing origin listed as Made in the USA. Well-suited for builders who pin and weld to meet desired lengths, the Gamma 556SL offers a balance of durability, a compact service-friendly profile, and chambering designed to support controlled follow-up shots. Its combination of stainless construction and nitride finish provides corrosion resistance and longevity for regular use.
