Next Level Armament NLX-9 Speed Muzzle Brake 5.56x45mm NATO Machined Stainless Black. The 9mm Speed Brake helps mitigate muzzle rise keeping you on target.Turned from solid stainless steel bars on our lathes then finished in our rotary mills to precision tolerances. The Nextride QPQ coat and laser engrave each part for a long lasting finish. NOTE: The Sig MPX and MCX have a tapered barrel. We include an adapter collar to properly install this product on your SIG. Specifications for Next Level Armament NLX-10 Speed Muzzle Brake: Manufacturer: Next Level Armament Color: Black Fabric/Material: 4140 Steel Stainless Steel Gun Make: Universal Gun Model: Universal Barrel Material: 416R Stainless Steel Length: 2.5 in Weight: 1 lb Features of Next Level Armament Speed Brake 223/556 AR15 x 28 threads Package Contents: Next Level Armament NLX-10 Speed Muzzle Brake What firearm models does the manufacturer say Next Level Armament NLX-10 Speed Muzzle Brake is compatible with? The manufacturer says that Next Level Armament NLX-10 Speed Muzzle Brake is compatible with UniversalNext Level Armament NLX403: NLX-9 Speed Muzzle Brake 5.56x45mm NATO Machined Stainless Black