The Precision Armament EFAB 5.56 hybrid brake (brand part no. A04484) is an enhanced flash-arresting brake aimed at short barrels, down to about 10 inches. Patented diverging expansion nozzles diffuse and cool the gases, which cuts recoil with minimal concussion to the rear and sides of the shooter. It is machined from heat-treated 416 stainless steel with an Ionbond CrCN coating, and the closed bottom reduces the dust signature when shooting prone. Precision Armament recommends the EFAB for SBRs, AR pistols and bullpups, though it works on 16-inch barrels too.

Key Specifications

• Caliber is .223 Remington and 5.56mm.
• The thread is 1/2×28, the standard AR-15 muzzle thread.
• Length is 2.5 inches.
• Diameter is 0.900 inch.
• Weight is 3.5 ounces.
• It is heat-treated 416 stainless steel with an Ionbond CrCN coating in matte black.
• The EFAB works well on barrels as short as 10 inches, where Precision Armament says it holds its flash suppression.
• It is pre-drilled for permanent pinning, with a closed bottom that reduces the dust signature when you shoot prone.

Frequently Asked Questions

Should I choose the EFAB or the AFAB? At 16 inches the EFAB has a marginal advantage over the AFAB. At 14.5 inches and below it has a substantial advantage, and Precision Armament recommends it for most SBR, AR pistol and bullpup applications.

What alignment accessory helps? Precision Armament recommends its AccuWasher muzzle device alignment system for best performance. It is not included.

Can I use a crush washer? No. Precision Armament cautions not to use crush washers with this product.

Buy the Precision Armament EFAB Hybrid Muzzle Brake, 5.56mm, 1/2×28

For short barrels the EFAB is Precision Armament’s answer to flash and blast. Order it from our Lubbock, Texas gun shop for fast direct shipping, and see more suppressors and muzzle devices while you are here.