The Rearden 10100 R2 0.375 5/8-24 Square Plan B Flash Hider is purpose-built for shooters running Plan B–style suppressor mounts. Machined from durable stainless steel with a black nitride finish, this .375 bore muzzle device uses a 5/8-24 thread pattern and a square shoulder to provide a solid, repeatable interface for Atlas, Atlas XL, and other compatible Plan B systems while helping to reduce visible muzzle flash.

This model is ideal for rifles chambered in compatible .375-caliber cartridges where a secure suppressor host and flash reduction are priorities. Its compact profile keeps added length to a minimum while the nitride treatment enhances corrosion resistance and promotes a tight gas seal. Whether you are setting up a dedicated suppressed range rifle or refining a training carbine, the R2 reflects Rearden’s focus on practical design and precise manufacturing.

Key Features:

• Manufacturer: Rearden
• Model: R2
• Caliber: .375
• Threaded Barrel: 5/8-24
• Type: Flash Hider
• Finish Color: Black Nitride
• Weight: 0.18–0.19 lb (approximate, per listings)
• Compatible Models: Atlas, Atlas XL, Plan B mounts