The NEW Gen 3 series is the most advanced muzzle brake on the market today. It features the advanced tunable technology along with a new nut design and an additional port The Gen 2 series just makes life simple. Its simple two-piece design does not require a professional install if you have a barrel that's already threaded. For the competitive shooter that burns through barrels like toilet paper, he can now move the brake from barrel to barrel in about 30 seconds. The Gen 1 series is meant to be installed by a competent gunsmith. The rear of the brake requires a chamfer to blend perfectly to your barrel. Additionally, the gunsmith will back bore the brake for perfect coaxial bore alignment. The end result is absolute mechanical & cosmetic perfection! If you don't like to read just click on the video to choose the right brake...