The American Precision Arms Gen 2 Fat Bastard is a self-timing muzzle brake built for .338 caliber rifles (APA part no. G2F5838N). It is precision machined from high-grade stainless steel, finished in black nitride, and threaded 5/8-24. Like the rest of the Gen 2 Series, it uses a separate timing nut rather than a crush or peel washer, so it installs and times at home in about 30 seconds. The Fat Bastard is sized for the larger barrels generally required by cartridges like .338 Lapua. It measures 3.30 inches overall with a 1.115-inch diameter.

Key Specifications

• It is threaded 5/8-24 tpi, matching common .338-caliber rifle threads.
• It measures 3.30 inches overall with a 1.115-inch diameter, sized for larger .338-class barrels.
• It is finished in black nitride over high-grade stainless steel for durability under repeated firing.
• The Gen 2 timing nut design installs at home in about 30 seconds, without a crush washer or peel washer.
• It is built for .338 caliber rifles, including cartridges like .338 Lapua that need a larger-diameter brake.

Frequently Asked Questions

What caliber and thread is this brake built for? It is built for .338 caliber rifles and threaded 5/8-24 tpi.

Do I need a crush washer to install this brake? No, the Gen 2 Series uses a separate timing nut instead of a crush or peel washer, so it installs and times at home in about 30 seconds.

Buy the American Precision Arms Gen 2 Fat Bastard Brake, .338 Cal, 5/8-24

Order it directly from our Lubbock, Texas gun shop for fast, insured shipping to your door. Shop the full American Precision Firearms lineup and browse our gun parts and accessories selection for more build components.