Otter Creek Labs Polonium Suppressor

Otter Creek Labs Polonium Suppressor Details

The Otter Creek Labs Polonium is a full-auto rated 5.56 suppressor for shooters who run their rifles hard and expect their silencer to keep up, while not breaking the bank. Machined from 17-4 stainless steel and made in the USA, it pairs serious sound reduction with an integrated flash hider that keeps muzzle signature down when the light gets low. The 6mm bore stretches one stamp across 5.56 hosts and 6mm cartridges alike.

Features & Benefits

• Full-auto rated 17-4 stainless steel construction built for high volume fire
• Integrated flash hider design cuts visible signature without an extra device on the muzzle
• 6mm bore covers 5.56/.223 plus 6 ARC, 6mm Creedmoor, and other 6mm cartridges (barrel minimums: 7.5 in for 5.56/.223, 10.5 in for 6 ARC, 12.5 in for 6mm Creedmoor, 6 Dasher, and .243 Win)
• 1/2x28 direct thread adapter and tube clamp included in the box, ready to mount out of the gate
• Backed by a lifetime warranty and built in the USA by Otter Creek Labs

Not sure which Polonium fits your build? This full-size 5.56 model is the do-everything pick. The Polonium K trims length for SBRs, and the Polonium 30 covers .30 cal hosts. Browse more 5.56 suppressors or the full Otter Creek Labs lineup.

Silencer Shop handles the entire process from cart to pick up;  see how to buy a silencer.

Frequently Asked Questions

What mounting options does the Polonium have?

The Polonium uses industry-standard universal 1.375x24 rear threads, so you can choose the mounting system that best fits your needs. It ships ready to direct thread with a 1/2x28 adapter, or you can swap in a compatible QD mount.

What is included in the box?

Each Polonium comes with the suppressor, a 1/2x28 direct thread adapter, a tube clamp, and an owner’s manual.

What barrel lengths does the Polonium require?

Minimum barrel lengths are 7.5 in. for 5.56/.223, 10.5 in. for 6 ARC, and 12.5 in. for 6 Creedmoor, 6 Dasher, .243 Winchester, and other 6mm cartridges.

Is the Polonium full-auto rated?

Yes. The Polonium is full-auto rated and built as a duty-grade, hard-use 5.56 suppressor. Otter Creek Labs does discourage pronged flash hiders on barrels shorter than 12.5 in., since they speed up wear on any suppressor, though this is a recommendation rather than a requirement.

What warranty does Otter Creek Labs offer?

The Polonium is backed by Otter Creek Labs’ “no BS” lifetime warranty.