OCL Polonium 5.56 Suppressor | 1/2×28 | POL556

The OCL Polonium is a duty-rated suppressor designed for 5.56 NATO platforms. It combines a compact 5.8-inch overall length with a 6mm internal bore and an industry-standard 1/2×28 direct-thread mounting option. The unit is constructed from H900 heat-treated 17-4 stainless steel and is intended for sustained, hard use while promoting rapid heat dissipation.

Common applications include law enforcement/duty use and precision/DMR-style shooting where a balance of durability, reduced signature, and compact dimensions are desired.

Product Specifications

• The manufacturer is OCL (Otter Creek Labs).
• The model is listed as Polonium.
• The manufacturer part number is POL556.
• The caliber/gauge is 5.56.
• The internal bore diameter is 6mm.
• The material is H900 heat-treated 17-4 stainless steel.
• The overall length is 5.8 inches.
• The outside diameter is 1.625 inches.
• The weight is 13.5 ounces (weight taken without mount).
• The thread pattern is 1/2×28.
• The suppressor is rated for full-auto use.
• The design provides up to 10% more surface area (depending on length) to aid heat dissipation.
• The package includes a 1/2×28 direct-thread adapter and a tube clamp for mount changes.
• The UPC is 664533654132.

The Polonium provides a compact, robust option for shooters who require a duty-rated suppressor with standard mounting compatibility. Its tubeless, welded construction and heat-treated 17-4 stainless steel body prioritize longevity and consistent performance under heavy use while maintaining a small footprint and modest weight. For users running sustained strings or operating in low-light environments, the integrated flash reduction features and increased surface area are practical design choices that contribute to cooler operation and reduced visual signature.

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