The American Precision Firearms Gen 2 Fat Bastard is a self-timing muzzle brake built for big-bore 338-caliber rifles that need serious recoil control (brand part no. G2F5838S). Machined from high-grade stainless steel by American Precision Firearms, this Gen 2 design uses a separate timing nut so you can install and index the brake at home in about 30 seconds, without a crush washer or peel washers to fight. At 3.30 inches overall with a 1.115-inch diameter, it stays compact on the muzzle while standing up to the punishment of magnum-class cartridges. It is a straightforward upgrade for hunters and long-range shooters who want less felt recoil without adding bulk.

Key Specifications

• 5/8-24 tpi thread pattern fits standard 338-caliber muzzle threads.
• Compact 3.30-inch overall length keeps the brake close-coupled to the muzzle.
• 1.115-inch outside diameter matches large-bore 338 rifle barrels.
• Precision-machined from high-grade stainless steel for corrosion resistance and durability.
• Self-timing two-piece design: a separate timing nut lets you index the brake at home in about 30 seconds.
• No crush washer or peel washer needed for a clean, repeatable installation.

Frequently Asked Questions

What caliber is the Fat Bastard Gen 2 brake built for? It’s sized for 338-caliber rifles such as 338 Lapua Magnum that use larger-diameter barrels.

Do I need a crush washer to install it? No. The Gen 2’s separate timing nut lets you index and lock the brake without a crush washer or peel washers.

How long does installation take? About 30 seconds — thread it on, then use the separate timing nut to lock the brake in the correct orientation.

Buy the American Precision Firearms Gen 2 Fat Bastard Muzzle Brake

Order the Gen 2 Fat Bastard from our Lubbock, Texas gun shop and tame recoil on your 338-caliber rifle without a trip to the gunsmith. Check out our full gun accessories and parts selection for more muzzle devices. Ships fast from a Lubbock, TX gun shop.