The Rearden RPB Heat Treat 5/8x24 Square Plan B muzzle brake is purpose-built for shooters running Atlas, Atlas XL, or Plan B style suppressor mounts. Machined from durable 17-4 PH stainless steel and finished in a distinctive H900 wheat gold tone, it offers a compact profile with precise ports designed to manage recoil and muzzle movement while remaining compatible with popular Plan B type systems.

With a .375 bore and 5/8x24 thread pitch, this RPB muzzle brake is ideal for modern rifles that need a secure suppressor-ready mounting solution without sacrificing control or consistency. Its short overall length and added length of just over an inch help maintain a balanced rifle while providing the correct shoulder for Atlas and Atlas XL adapters. Shims are included for proper timing, and the design reflects Rearden’s focus on thoughtful engineering and reliable performance for dedicated range use and training.

Key Features:

• Manufacturer: Rearden
• Model: RPB
• Type: Muzzle Brake
• Bore Size: 0.375
• Thread Pitch: 5/8x24
• Compatibility: Atlas, Atlas XL, Plan B mounts
• Material: 17-4 PH stainless steel
• Finish: H900 wheat heat treat, gold tone
• Weight: 1.71 oz
• Length: 1.74"
• Length Added: 1.115"
• Shims Included: Yes