The APA Gen 4 Little Bastard muzzle brake from American Precision Arms is a self-timing muzzle brake built for  barrels with a muzzle diameter of .750" to 1".

Designed for quick and easy installation, this brake requires no crush washers or peel washers, allowing shooters to install or remove it in about 30 seconds—perfect for cleaning or swapping between barrels.

With the 4th generation upgrades, APA set out to achieve two key goals: creating the flatter-shooting brake and minimizing concussion while maximizing recoil reduction.

APA Gen 4 upgrades:

• Optimized top ports for better recoil control and tunability
• New port design & internal manifold for improved efficiency and a softer sound
• Caliber and level line machined onto the brake face for easy alignment
• No Loctite needed in the top ports

This muzzle brake is engineered for precision shooters who demand top-tier performance and hassle-free use.