The American Precision Arms G4F5865S Gen 4 Fat Bastard Self Timing Stainless muzzle brake is built for shooters who want a flatter, more controlled rifle under recoil. Machined from stainless steel with a 5/8"x24 thread pattern, this Gen 4 brake uses calibrated U.R.P tunable top ports and deep side baffles to manage gas flow, helping keep the muzzle level and shots on target. Its 3.30" overall length and 1.10" diameter are optimized for 6.5mm platforms, pairing well with precision and long-range rifles.

This self-timing design allows straightforward installation without the need for shims, making it easier to fine-tune port screws for your specific rifle and load. The carefully engineered internal manifold and port geometry aim to reduce vertical movement and soften perceived blast, supporting faster follow-up shots and more consistent performance at the range or in competition. It reflects American Precision Arms’ focus on thoughtful engineering, repeatable results, and clean, professional machining.

Key Features:

• Manufacturer: American Precision Arms
• Model: Gen 4 Fat Bastard G4F5865S
• Caliber: 6.5mm
• Condition: New
• Thread Pattern: 5/8"x24
• Overall Length: 3.30"
• Diameter: 1.10"
• Material: Stainless Steel
• Weight: 6.4 oz
• Unique Features: Self-timing design with calibrated U.R.P tunable top ports