The Rearden SPB 0.375 5/8-24 Square Plan B muzzle brake is engineered to pair seamlessly with Plan B–type mounts while offering precise gas management and a clean, compact profile. Machined from durable stainless steel and finished in black nitride, it delivers a hard, corrosion-resistant surface that stands up to heavy use and repeated suppressor attachment. Its square shoulder design and .375 bore are optimized for proper alignment on compatible barrels and silencers.

This SPB muzzle brake is well suited for range use, training, and general shooting where recoil control and consistent suppressor mounting are priorities. The 5/8-24 thread pitch and Atlas, Atlas XL, and Plan B compatibility make it a versatile choice for modern rifle builds that see regular suppressed and unsuppressed use. Rearden’s attention to detail in materials, machining, and interface geometry reflects the brand’s reputation for thoughtful, shooter-focused innovation.

Key Features:

• Manufacturer: Rearden Manufacturing
• Model: SPB
• Caliber: .375 Bore
• Finish Color: Black Nitride
• Threaded Barrel: 5/8-24 Muzzle Threads
• Type: Muzzle Brake
• Unique Features: Plan B, Atlas, and Atlas XL Compatible Square Shoulder Design
• Weight: 0.109 lbs
• Length: 1.73"