Product Description The Rearden SPB Muzzle Brake is a precision-machined muzzle device built for shooters who require top-tier performance and suppressor compatibility. Constructed from 17-4 PH H900 stainless steel, this muzzle brake features a 1/2-28 thread pitch and a .375 bore size, making it an ideal choice for a wide range of rifle builds. The heat treatment process gives the brake its distinctive gold appearance while achieving a surface hardness of 67 HRC, ensuring long-lasting durability under demanding conditions. Compatible with Atlas, Atlas XL, and Plan B suppressor mount systems, this muzzle brake offers versatility without compromise. Shims are included to facilitate proper installation and alignment. Product Highlights Machined from 17-4 PH H900 stainless steel for superior strength and corrosion resistance Compatible with Atlas, Atlas XL, and Plan B suppressor mounting systems for maximum versatility Heat treated finish delivers a distinctive gold appearance with a 67 HRC surface hardness 1/2-28 thread pitch and .375 bore size provide precise fitment for a secure, repeatable mount Shims included to ensure proper installation, alignment, and a tight barrel shoulder seal Specs Brand: Rearden Manufacturing Model: SPB MPN: 10010 UPC: 850035804094 Type: Muzzle Brake Thread Pitch: 1/2-28 Bore Size: .375" Finish: Heat Treated (Gold) Surface Hardness: 67 HRC Material: 17-4 PH H900 Stainless Steel Compatibility: Atlas, Atlas XL, Plan B Width: 3.9" Length: 5.5" Height: 1.2" Weight: 0.21 lbs Shims Included: Yes Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.