MPN: 0011510035 / 0011510033


  • Innovative port design
  • Superior recoil reduction
  • Reduce muzzle rise
  • Made is U.S.A.


  • Caliber: .223 Rem. / 5.56 NATO
  • Material: 416R Stainless Steel
  • Finish: Melonited Black or Bead Blasted Stainless Steel
  • Length: 2.43"
  • Outer Diameter: 0.87"
  • Weight: 3.6 oz.
  • Thread: 1/2" x 28


  • Any 5.56/.233 caliber barrel with 1/2"-28 thread pitch


  • 1x Seekins Precision AR 5.56 ATC Muzzle Brake
  • 1x Muzzle Lock Nut


If you need a high-quality muzzle brake for your AR-15, consider the Advanced Tactical Compensator (AR-ATC) by Seekins Precision. Seekins Precision has been in the business of creating high-quality parts for firearms since 2005. The company has grown from producing only scope rings to selling 10 major product lines that include complete rifles.

What Set The Seekins ATC Muzzle Brake Apart From Other Muzzle Devices

This compensators, also known a muzzle brakes, help reduce the force of the hot gas exiting the barrel after the weapon is fired. Openings in the side of a muzzle brake divert some of these gasses to the side of the muzzle, thereby reducing the rearward motion of the weapon during recoil. Because a compensator helps reduce muzzle rise, it can be very useful for those who need to perform rapid follow-up shots without losing the target or the sight picture.

Unlike many similar products, this Seekins Precision Muzzle Brake does not require the use of peel or crush washers for proper installation. A knurled timing nut makes the installation and removal of this ATC muzzle brake almost as easy as brushing your teeth. Successful alignment no longer requires repeated trial-and-error attempts. This product is available in two colors and is designed to fit barrels chambered in .223 Remington / 5.56 NATO.

This AR-ATC is for barrels chambered in .223 Rem. / 5.56 NATO, for .308 Win. / 7.62 NATO / 300 BLK, please look at the Seekins Precision AR 308 / 300 BLK ATC Muzzle Brake.

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Reviews (3)

  • works

    Posted by Jeffrey N Reiland on 22nd Feb 2021

    This fit with no issues. Cant wait to try it out

  • ATC Muzzle Brake in 5.56

    Posted by Joe B. on 27th Apr 2020

    I really like the ATC muzzle brake but, because of all this coronavirus crap, I haven't been able to shoot the gun since I put it on. It looks cool and it went on nicely (no crush washer is good). Fit and quality is top notch.

  • Works Well

    Posted by Unknown on 1st Aug 2017

    I installed on my Bushmaster rifle and the recoil and kick up was reduced enough to notice it, so it works. It has a cool look on the gun. Only complaint is it will not align with the barrel for cosmetics. If you line up the flat side with the top of the barrel and screw the ring to it, it will come loose. I had to tighten the ring down on the gun, tighten the compensator to the ring and ignore the alignment. Not a show stopper, but annoying.

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