The Otter Creek Labs Polonium is a premium full-size 5.56 suppressor designed for shooters seeking exceptional sound suppression, rugged durability, and reliable performance under demanding conditions. Built from H900 heat-treated 17-4 stainless steel, the Polonium delivers professional-grade durability while maintaining a lightweight and efficient design.
Whether mounted on a hard-use MK18, duty rifle, SPR, DMR, or general-purpose AR-15, the Polonium was engineered to provide outstanding suppression performance without sacrificing strength or reliability. Its full-size design prioritizes sound reduction while maintaining excellent flash suppression and durability during extended firing schedules.
The suppressor's unique exterior profile removes unnecessary material while preserving structural integrity. This innovative design increases surface area by approximately 10%, helping the suppressor cool faster and shed heat more efficiently during heavy firing sessions.
The Polonium is Otter Creek Labs' flagship full-size 5.56 suppressor, delivering exceptional suppression, superior flash reduction, HUB compatibility, and full-auto durability. Designed for shooters who prioritize maximum sound performance, it excels on everything from compact SBRs to long-range SPR and DMR platforms.
Designed specifically to be a quiet, duty-rated suppressor, the Polonium provides impressive sound reduction across a wide range of host firearms. Its full-size configuration offers enhanced suppression performance compared to shorter K-length suppressors, making it ideal for shooters seeking the quietest possible setup.
Constructed from H900 heat-treated 17-4 stainless steel, the Polonium is built to withstand demanding firing schedules and professional use. Whether subjected to rapid strings of fire on a short-barreled rifle or extended precision shooting sessions on a designated marksman rifle, the Polonium is engineered for long-term reliability.
The Polonium incorporates highly effective internal and external flash-hiding features that significantly reduce visible muzzle flash and shooter signature. This makes it particularly effective for low-light shooting and night vision applications where flash mitigation is critical.
Featuring the industry-standard 1.375x24 HUB mounting interface, the Polonium allows shooters to choose from a wide variety of direct-thread and quick-detach mounting systems. Included with the suppressor is a 1/2x28 direct-thread adapter and tube clamp for immediate installation.
| Manufacturer | Otter Creek Labs |
| Model | Polonium |
| Manufacturer Part Number | POL556 |
| Caliber | 5.56 NATO |
| Compatible Bore Size | 5.56 NATO / 6mm / .243 |
| Length | 5.8" |
| Diameter | 1.625" |
| Weight | 13.5 oz |
| Material | H900 Heat-Treated 17-4 Stainless Steel |
| Finish | Cerakote Black |
| Mount Interface | 1.375x24 HUB Compatible |
| Included Mount | 1/2x28 Direct Thread Adapter |
| Rating | Full Auto Rated |
| UPC | 664533654132 |
The Otter Creek Labs Polonium is designed for shooters who prioritize suppression performance without compromising durability. With exceptional sound reduction, outstanding flash suppression, full-auto durability, and universal HUB compatibility, the Polonium stands out as one of the most capable full-size 5.56 suppressors available for modern sporting rifles, duty carbines, and precision AR platforms.
Otter Creek Labs
