Lastly, for the AK47, the thread size is 14×1 mm LH, 2.275 inches long, weighs 3 ounces, and has a diameter of 0.945. As for 7.62mm caliber, the thread size is ⅝-24 RH, 2.275 inches long, 0.985 inches in diameter, and weighs 3.1 ounces. The Precision Armament M4-72 Severe Duty Compensator’s specs differ depending on the caliber of your rifle.įor 5.56mm, the thread size is ½-28 RH, 2.25 inches in length, a diameter of 0.865 inches, and weighs 2.6 ounces. Compensatorįor compensators, the design differs by the way the holes are formed or drilled, which help them dissipate gasses upwards. I guess it cannot work when you’re buying Precision Armament. Grine placed the hour-long ordeal as a disadvantage in his post, maybe as a warning to anyone who plans to bypass the Accu-Washer purchase and buy an ordinary crush washer instead. He notes that they work well, but other people might not like the idea of a washer being visible. There are 18 different washers, all individually marked, and thus guarantee the most accurate bore alignment possible. He emphasized the perfect “timing” or “indexing” for the muzzle brake to be attached to his gun’s muzzle. Grine points out that M11 is not a symmetrical brake, thus the need for a specific Accu-Washer. The price is increased noise and blast concussion. Joe Grine of The Truth About Guns explains in his introduction to his review that the benefit or recoil reduction and little muzzle rise has a price, following Newton’s laws of physics. Many of the owners complain of the loud or amplified sound coming from their muzzle brakes. However, with those praises come slight undertones of disappointment. Lumping together hundreds of reviews online, there is a common theme of praise for the M11 Muzzle Brake. It is available in three calibers, namely 6.5 mm or. Thus, it is a muzzle-brake-compensator hybrid and not just a muzzle brake. Going by the design, this muzzle brake is combined with a couple of compensators at the top. It is 2.675 inches in length, 1.188 inches in height, and 1.375 inches in width. The Precision Armament M11 Severe-Duty Muzzle Brake weighs 5.6 ounces. The designs for muzzle breaks include sizeable holes drilled or formed along the sides of the device. Muzzle Brake CLICK IMAGE TO SEE THE CURRENT PRICE I don’t understand why, but let’s see if we can find an explanation somewhere. On the official website, it is not recommended to use crush washers for the products. The coating is vaporized then decompressed onto the surface.īoth of the muzzle brake and compensator need the Accu-Washer Alignment System for proper installation and best results for the devices. Ionbond, according to the Ionbond website, is done by Chemical Vapor Decomposition, a process of a low-stress coating through thermally-induced chemical reactions. The matte stainless is a stain grey finish made with stainless steel-in-the-white. For the M11, the hardness is indicated as HRC 26-32.Īs for the finishes, the matte black is an advanced Ionbond high-temperature CrCN coating. HTSR stands for “heat treated stress relieved”. HTSR 416 Stainless Steel is a type of steel that corrodes much slower than regular steel. Common Features and Materialsīoth made from HTSR 416 stainless steel bar, the Precision Armament M11 Severe-Duty Muzzle Brake, and Precision Armament M4-74 Severe Duty Compensator both come in two finishes, either matte black or matte stainless. I’ll be reviewing one muzzle brake and one compensator from Precision Armament, a company based in Wellsville, New York, and a member of the National Rifle Association Business Alliance. With this knowledge, I looked through the different listings for muzzle brakes and compensators and found that the design does differ slightly. This fact is echoed by a lot of videos and reviews. Compensators may cause temporary blindness when used at night, and muzzle brakes amplify sounds. Jim Satney, writing for Prep For That, gives another difference in the disadvantages found in the two devices. He explained that muzzle brakes give more forward thrust to the gun, while compensators give a downwards thrust. While looking for the simplest explanation of the difference between a muzzle brake and a compensator, I watched a Youtube video by Langley Outdoors Academy.