Meraki Machine SF Muzzle Brakes, 4 PortFeatures: Maximum recoil reduction; Improved accuracy; High-quality stainless steel construction; Raw black nitride finish for added protection against corrosion and wear; Self-timing design for easy installation and perfect alignment; Multiple ports to redirect gas and reduce recoil; Compact size and sleek design; Description: Upgrade your shooting experience with the SF Self-Timing Muzzle Brake. This high-quality muzzle brake is designed to provide shooters with maximum recoil reduction and improved accuracy. Constructed from durable stainless steel and finished with raw black nitride, this brake is built to withstand even the toughest shooting conditions.The self-timing design of the brake allows for easy installation and perfect alignment with your barrel, while the multiple ports redirect gas to reduce recoil and improve follow-up shots. The compact size and sleek design of the brake make it an ideal choice for shooters looking to enhance the performance of their rifle without adding unnecessary bulk. Built out of 17-4 stainless steel; Designed for competition shooters; Upward angled baffles help eliminate gas without kicking up dust ; Lightweight effective design; 4 ports; Easy to mount; Weight: 3.2 Oz; 6.5 mm caliber good for any caliber up to and including 6.5 mm; .30 caliber good for any caliber up to and including .308; LOCK NUT IS A LEFT HANDED THREAD! Muzzle brakes have right handed internal threads. When possible some form of thread anti-seize is recommended on lock nut threads.;