The Otter Creek Labs Polonium 30 black is a .30-caliber suppressor for 7.62mm rifles (Otter Creek Labs part no. POL30). At 5.8 inches it is compact for a .30-caliber can, keeping a rifle short and handy. It fits a 5/8×24 thread, the standard pitch on .308-class barrels. The black finish matches most rifles. It suits a 7.62mm AR-10 or bolt-action rifle that needs a short can.

Key Specifications

• The caliber rating is 7.62mm, built for .30-caliber rifles.
• Length is 5.8 inches, compact for a .30-caliber can.
• Thread pattern is 5/8×24, the standard .308-class barrel pitch.
• The finish is black, which distinguishes this version from the FDE Polonium 30.

Frequently Asked Questions

What rifles is the Polonium 30 for? It is rated for 7.62mm and fits a 5/8×24 thread, common on .308-class rifles.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for suppressors. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply.

Is this the black Polonium 30? Yes. This listing is the black version; an FDE Polonium 30 is listed separately.

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

As of October 9, 2026, this suppressor transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. A short .30-caliber can keeps an AR-10 or bolt gun handy. Order through Otter Creek Labs‘s suppressors lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.