Otter Creek Labs Polonium 5.56 Suppressor - Black

Otter Creek Labs Polonium 5.56 Suppressor - Black

Combine extreme duty-grade durability with industry-leading sound suppression with the Otter Creek Labs Polonium 5.56 Suppressor in Black Cerakote. Engineered for hard-use tactical rifles, precision setups, and high-volume training schedules, the Polonium is precision-crafted from H900 heat-treated 17-4 stainless steel. Featuring Otter Creek's iconic ribbed exterior, this unique material-reducing design increases effective surface area by up to 10% compared to traditional smooth suppressor tubes—radically accelerating heat dissipation and cooling during sustained strings of rapid fire.

Built with a versatile 6mm bore, the Polonium effortlessly handles both .223 Rem / 5.56 NATO and 6mm / .243 cartridges while maintaining exceptional decibel reduction. Its integrated internal and external flash hider geometry effectively eliminates visual muzzle signature, making it an outstanding choice for low-light engagements and night vision operations. Equipped with universal 1.375x24 HUB rear threads, an included 1/2x28 direct thread adapter, and a handy tube clamp for installation, the Polonium packs maximum performance into a compact 5.8-inch, 13.5-ounce footprint.

Features

Duty-Rated H900 Stainless Steel Build:
Machined from H900 heat-treated 17-4 stainless steel to deliver ultimate thermal resilience, structural strength, and hard-use durability on short-barreled rifles.

Iconic Ribbed Heat-Dissipation Exterior:
Strategic weight-reducing exterior cuts increase cooling surface area by 10%, shedding heat rapidly during intensive firing schedules compared to standard cylindrical tubes.

Versatile 6mm Bore Diameter:
Optimized bore size accommodates 5.56 NATO / .223 Rem as well as 6mm ARC and .243 Win cartridges, offering multi-caliber flexibility without compromising acoustic efficiency.

Night Vision-Ready Flash Suppression:
Features engineered internal and external flash hider geometry at the end cap to minimize visual signature and flash bloom under night vision optics.

Universal 1.375x24 HUB Rear Threading:
Standardized HUB threading accepts a wide array of quick-detach and direct-thread mounting systems available on the market.

Complete Mounting Package Included:
Ships factory-ready with a 1/2x28 direct thread adapter and an Otter Creek tube clamp to simplify torque application and mount installation.

Specifications