*It is recommended to use Accu-Washer Alignment System for installation. (Using standard crush washer can result in unacceptable misalignment)
If you run in the .30 caliber circle you already know that there are challenges you don't face with a smaller gun. Recoil, muzzle rise, and concussion increase, not that you can't handle it, but it's something to be considered. Therefore, the addition of a muzzle brake is pretty much a foregone conclusion, but which one? Of course, you can go Birdcage, or you can go with a Precision Armament EFAB .308, which is light years ahead of the competition.
The Precision Armament EFAB .308 performs as well as any muzzle brake out there as far as limiting muzzle rise and recoil. However, you will notice significantly less concussion coming back in your face. Its ports are machined laterally to divert the blast away from you and not into the ground. That means if you're firing prone there is very little dust signature to cloud your vision and give away your position.
The Precision Armament EFAB hybrid flash hider muzzle brake combines the elements of a fantastic muzzle brake with a superior flash hider. Okay, maybe you won't be taking your AR into combat, but this feature still could mean a great deal to you. When you're hunting, the first shot doesn't always do the trick. The Precision Armament EFAB hybrid flash hider muzzle brake keeps your muzzle flat for a quick follow-up shot and muzzle flash to a minimum. You have a better chance of seeing your target without it seeing you the second time around. The benefits of a Precision Armament EFAB .308 on your PDW can make the difference of you actually getting a second chance.