The FPM SSPL-556-58X24-SS-BLKDLC Spleen 556 5/8x24 is a compact muzzle brake engineered for 5.56 NATO and .223 Remington rifles that use a 5/8x24 threaded barrel. Built from durable 17-4 stainless steel with a heat-treated black DLC style finish, this Spleen Splitter design focuses on hard-use reliability in a short, efficient package.

This model’s 2.170 inch overall length and dual-port windowed body make it a practical choice for rifle builds, upgrades, or replacements where a strong, compact muzzle device is preferred. Its construction and finish are aimed at shooters who want a clean, purposeful look with long-term durability for range work, training, or general recreational shooting. The design reflects FPM Gunworks’ focus on precise machining and robust firearm accessories.

Key Features:

• Manufacturer: FPM Gunworks
• Model: Spleen Splitter
• Caliber: 5.56 / .223
• Thread Pattern: 5/8x24
• Overall Length: 2.170 in
• Material: 17-4 Stainless Steel
• Finish: Heat Treated
• Product Type: Muzzle Brake