Otter Creek Labs Polonium K

The Polonium-K is a quiet, robust, and hard-use 5.56 suppressor designed for versatility. It performs equally well on a MK18 under heavy fire as it does on a DMR/SPR setup aimed at maximum suppression. Its distinctive design features external weight reduction, eliminating unnecessary materials to maintain strength while reducing weight, resulting in 10% more surface area. This design improves heat dissipation and cooling. The Polonium-K includes two fewer baffles than the full-sized Polonium but still offers excellent ear suppression.

It operates with a 6mm bore, accommodating any 6mm/.243 cartridges.

The integrated flash hider effectively reduces flash and signature, especially beneficial when using night vision.

For mounting options, the Polonium comes with industry-standard 1.375×24 rear threads for compatibility with various systems.

Constructed from H900 heat-treated 17-4 stainless steel, it features a tubeless design with these specifications:
- Outer Diameter (OD): 1.625”
- Length: 4.8? (without mount)
- Weight: 11.5 oz (without mount)
- Sound Level: 137 dB on an 11.5” 5.56 SBR with BK 2209

Barrel length and firing schedule guidelines:
- 10.3” – 5.56/223
- 11.5” – 6 ARC
- 14.5” – 6 Creedmoor, 6 Dasher, .243 Winchester, and other 6mm cartridges

It's fully auto-rated without compromise and responsibly rated for belt-fed use on 16? 5.56mm machine guns, backed by a lifetime warranty.

Included in the box:
- Suppressor
- Stickers
- Instruction and specifications pamphlet
- 1/2×28 direct thread adapter
- Tube clamp for mount installation