The Otter Creek Labs Polonium 30 7.62mm suppressor in Black (brand part no. POL30) is a budget-friendly .30-caliber stainless can with a built-in flash hider. It is made from 17-4 stainless steel and measures just 5.8 inches long at 13.5 ounces, which keeps added length down on a short-barreled AR or a magnum rifle alike. The maker rates it from 5.56 up through .300 Norma Magnum, with minimum barrel lengths by caliber group. A minimalist ribbed profile removes weight and adds surface area so it sheds heat more efficiently. This is the Black Polonium 30; the other color is a separate SKU.

Key Specifications

• Rated from 5.56 up through .300 Norma Magnum, which is why it works on everything from short ARs to magnum rifles.
• Length is 5.8 inches, compact for a .30-caliber suppressor.
• Weight is 13.5 ounces, a good balance of size and sound reduction.
• Outside diameter is 1.625 inches, matching the rest of the Polonium and Hydrogen line.
• The body is 17-4 stainless steel, CNC-welded for a tubeless design that holds up to hard use.
• The rear thread is the 1.375×24 universal interface, so you can choose a direct-thread or quick-detach mount.
• A 5/8×24 direct-thread adapter comes in the box, so it mounts on a standard muzzle thread without extra parts.
• The flash-hiding end cap reduces muzzle flash, which helps in low light and with night vision.
• It is full-auto rated, built for demanding firing schedules.
• Color is black, set by the SKU for this version.

Frequently Asked Questions

What calibers is the Polonium 30 rated for? Otter Creek Labs rates it from 5.56 up through .300 Norma Magnum, with minimum barrel lengths that increase as the cartridge gets larger.

Is the Polonium 30 full-auto rated? Yes, the maker states the Polonium 30 is full-auto rated.

Is this an NFA item? Yes. As a suppressor, it’s a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

Buy the Otter Creek Labs Polonium 30 Suppressor, 7.62mm, Black

This is a Title II item regulated under the National Firearms Act. Purchase requires an approved ATF Form 4, no federal transfer tax, and transfer through a licensed NFA (SOT/Class 3) dealer; ATF approval on most individual eForm 4 filings now comes back in days, and trusts take a little longer. Order through Otter Creek Labs‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will walk you through the transfer process.