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Questions & Answers
Customer Reviews
Helpful Positive Review
Long live the fat bass poo by Sproket, Verified Owner, April 24, 2024
This is by far the most recoil mitigating muzzle device I have ever used. The tunability of the small ports on top let your stay on top of the target better than anything else even with the recoil of a healthy 300 win mag load. I find it hilariou...
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1/1 found this helpful
Most Recent Reviews
fat b gen 3 by mr B, Verified Owner, January 22, 2025
Fit like a glove, the installation was simple do you wanna be the one with the loudest gun at the range? This is it The tunable muzzle holes at the top genius easy to set up Had the wrong one shipped sent it back they sent me the right one right aw...
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Most Recent Reviews
Really tamed my 338 lapua. Simple install with great performance thanks optics planet
0/1 found this helpful
Most Recent Reviews
great muzzle device by big richard, Verified Owner, November 12, 2024
little tricky getting it timed but once you do its there an it makes 223 with 75 grain bullet feel like 22lr with 32 grainer in it ill definitely purchase another in future from op youd better be down with op
Most Recent Reviews
Sure tamed my 338 lapua and made it so I can watch the vapor trail all the way to the target. Thanks optic planet
Most Recent Reviews
American Precision Arms by Dan, Verified Owner, March 3, 2024
Quality product, large enough that it looks great with my 24x1.25in barrel for a bench gun.
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Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for American Precision Arms Fat Bastard Self Timing Muzzle Brake

American Precision Arms is very excited to share the release of Fat Bastard. It has been a long time coming but they wanted to make sure everything was perfect before offering something new.image

The development of APA Fat Bastard was the result of American Precision Arms' constant pursuit of breaking the mold and a desire to meet the demands of the Long-Range and Hunting markets. APA has combined the standards of high-level performance and reliability with distinctive design enhancements to improve both accuracy and performance. These enhancements benefit the shooter experience at the range and in the field where every advantage matters.

The roots of the new version of the Fat Bastard lie in the requests of the elite long-range precision rifle community. APA's goal was to meet the needs of those shooters while also maintaining their standards of pristine manufacturing. Among the design, changes are three key features. The advanced Unique Recoil Profile tunable top port design allows the shooter to fine-tune the muzzle movement for absolute target retention. In addition to that, the new lock nut design creates a zero over rotating platform. Last, is the addition of a fifth Bastard port section that eliminates even more recoil than before.

This allows the shooter to not only combat direct recoil but muzzle rise and lateral movement based on the characteristics of their rifle, personal grip, stance, and the position they are shooting from.

They developed the U.R.P. Adjustable Gas System. These aren't just randomly placed top ports. Every port is placed adjacent to the internal Bastard tooth where there is maximum pressure build-up. This makes the adjustable ports directionally effective.

The unique tunable gas system combined with the trademark APA ports work together to achieve a sight picture that moves less than ever before. There are 10 directional gas ports that can be tuned to counteract youre U.R.P. (unique recoil profile).

There are endless combinations to keep your sights on target. To calibrate the brake to your U.R.P., start testing with all the gas screws installed. Pay attention to the movement of your reticle, and begin removing the gas screws as the recoil requires.

When the gas screws are removed on the right side, the rifle will be shifted left. For the opposite effect simply remove the screws on the left. The gas holes closer to the nut have a more dramatic effect and the ports closer to the brake crown have a lesser effect. When you find your U.R.P. combination, Threadtite your screws into place.

Specifications for American Precision Arms Fat Bastard Self Timing Muzzle Brake:

Manufacturer: American Precision Arms
Projectile Caliber: .338 Caliber
Fabric/Material: Stainless Steel
Threads per Inch: 5/8x24
Model Generation: 2
Inner Diameter: 1.1 in
Length: 3.5 in
Weight: 7.2 oz
Included Accessories: Standard
Condition: New
Country of Origin: USA

Package Contents:

  • American Precision Arms Fat Bastard Self Timing Muzzle Brake
  • Set screws
  • One Allen wrench
  • Single-use Threadtite

American Precision Arms Fat Bastard Self Timing Muzzle Brake Orderable Models

List of Orderable Models

  • American Precision Arms Fat Bastard Self Timing Gen 2 Muzzle Brake, .338 or Smaller, 5/8x24, Nitrided, G2F5838N , MPN: G2F5838N , UPC: 810131790875 , Code: 46Y-BMB-G2F5838N-G2F5838N
  • American Precision Arms Fat Bastard Self Timing Gen 2 Muzzle Brake, .338 or Smaller, 5/8x24, Stainless, G2F5838S , MPN: G2F5838S , UPC: 810131790844 , Code: 46Y-BMB-G2F5838N-G2F5838S

American Precision Arms Fat Bastard Self Timing Muzzle Brake Unavailable & Discontinued Models

List of Unorderable Models

  • American Precision Arms Fat Bastard Self Gen 3 Timing Muzzle Brake, .338 or Smaller, 5/8x24, Stainless, G3F5838S , MPN: G3F5838S , UPC: 810131790677 , Code: 46Y-BMB-G2F5838N-G3F5838S
  • American Precision Arms Fat Bastard Self Gen 3 Timing Muzzle Brake, .30, 5/8x24, Stainless, G3F5830S , MPN: G3F5830S , UPC: 810131790660 , Code: 46Y-BMB-G2F5838N-G3F5830S
  • American Precision Arms Fat Bastard Self Gen 3 Timing Muzzle Brake, .30, 5/8x24, Nitrided, G3F5830N , MPN: G3F5830N , UPC: 810131790615 , Code: 46Y-BMB-G2F5838N-G3F5830N
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, .223, 5/8x24, Stainless, G3F5822S , MPN: G3F5822S , UPC: 810131790639 , Code: 46Y-BMB-G2F5838N-G3F5822S
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, .6.5mm, 5/8x24, Stainless, G3F5865S , MPN: G3F5865S , UPC: 810131790653 , Code: 46Y-BMB-G2F5838N-G3F5865S
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, .338, 3/4x24, Nitrided, G3F3438N , MPN: G3F3438N , UPC: 810131790714 , Code: 46Y-BMB-G2F5838N-G3F3438N
  • American Precision Arms Fat Bastard Self Gen 3 Timing Muzzle Brake, .338 or Smaller, 5/8x24, Nitrided, G3F5838N , MPN: G3F5838N , UPC: 810131790622 , Code: 46Y-BMB-G2F5838N-G3F5838N
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, .30, 3/4x24, Stainless, G3F3430S , MPN: G3F3430S , UPC: 810131790745 , Code: 46Y-BMB-G2F5838N-G3F3430S
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, 6mm, 5/8x24, Nitrided, G3F5860N , MPN: G3F5860N , UPC: 810131790592 , Code: 46Y-BMB-G2F5838N-G3F5860N
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, 6mm, 3/4x24, Stainless, G3F3460S , MPN: G3F3460S , UPC: 810131790721 , Code: 46Y-BMB-G2F5838N-G3F3460S
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, 6mm, 5/8x24, Stainless, G3F5860S , MPN: G3F5860S , UPC: 810131790646 , Code: 46Y-BMB-G2F5838N-G3F5860S
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, 6.5mm, 3/4x24, Nitrided, G3F3465N , MPN: G3F3465N , UPC: 810131790691 , Code: 46Y-BMB-G2F5838N-G3F3465N
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, .30, 3/4x24, Nitrided, G3F3430N , MPN: G3F3430N , UPC: 810131790707 , Code: 46Y-BMB-G2F5838N-G3F3430N
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, 6.5mm, 5/8x24, Nitrided, G3F5865N , MPN: G3F5865N , UPC: 810131790608 , Code: 46Y-BMB-G2F5838N-G3F5865N
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, .223, 5/8x24, Nitrided, G3F5822N , MPN: G3F5822N , UPC: 810131790585 , Code: 46Y-BMB-G2F5838N-G3F5822N
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, 6mm, 3/4x24, Nitrided, G3F3460N , MPN: G3F3460N , UPC: 810131790684 , Code: 46Y-BMB-G2F5838N-G3F3460N
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, .338, 3/4x24, Stainless, G3F3438S , MPN: G3F3438S , UPC: 810131790752 , Code: 46Y-BMB-G2F5838N-G3F3438S
  • American Precision Arms Fat Bastard Gen 3 Self Timing Muzzle Brake, 6.5mm, 3/4x24, Stainless, G3F3465S , MPN: G3F3465S , UPC: 810131790738 , Code: 46Y-BMB-G2F5838N-G3F3465S
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