MPN: FATman-5/8-24


  • Reduce the overall felt recoil
  • Two 20 degree forward directed angle top ports
  • Two large ventilated baffle chambers
  • Maintain the full accuracy of the barrel
  • Includes crush washer
  • Made in the U.S.A.


  • Caliber: 7.62 NATO / .308 Win. / 300 Blackout
  • Material: Steel
  • Finish: Parkerized
  • Length: 3'' (Approx. 1.35" from barrel crown to the end of this muzzle brake with crush washer installed)
  • Width: 1.26"
  • Weight: 5.8 oz.
  • Thread: 5/8"-24


  • .308/300 Blackout barrel with 5/8"-24 thread pitch


  • 1x Phase 5 Tactical FATman Hex Brake (.308 / 300 Blackout)
  • 1x Crush Washer


As a precision shooter, you want a muzzle device that handles recoil in a superior fashion without interfering with the accuracy of your rifle. Phase 5 offers their answer to recoil motion and muzzle rise with the Phase 5 FATman Hex Brake.

The FATman is designed with dual chambers with 2 FAT baffle sections that direct expelled gasses to manage backward recoil impulse. Dual 12 o’clock machined ports control upward muzzle rise. The result is a dead flat recoil motion. Felt impulse is reduced to a level that’s easily controlled for superior accuracy shot after shot.

The Phase 5 FATman 308 Muzzle brake is the marksman’s best friend. Phase 5’s designers have engineered this device so that the initial chamber wall sits more closely to the barrel crown than any competing device. This helps the FATman maintain the accuracy of your match barrel at its fullest potential.

The hexagonal design of the FATman muzzle brake makes for a tough looking addition to your rifle. It threads in place over your rifle barrel, fitting back under even the closest fitting hand guard. The result is an aggressive one-piece look that integrates the Phase 5 FATman into the silhouette of your rifle. Mil-Spec black parkerized finish lets the FATman blend flawlessly with your hand guard.

The hex design of the FATman 308 brake also offers an unexpected bonus to the amateur armorer. Timing the Device properly becomes a much simpler matter when you can apply a level to the 12 o’clock surface of the muzzle to find out if it’s true. The Phase 5 FATman 308 Muzzle brake is compatible with 7.62 x 51, .308, and 300 blackout rifles. It’s long enough to keep short barrel enthusiasts legal and comes complete with a crush washer so you’re ready to install on arrival.

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