Otter Creek Labs Polonium K 5.56 Suppressor

Out of stock
as of 04/15/2024 1:49PM CST
Store Inventory
Available OnlineOut of stock
Fountain Valley, CAOut of stock
The Colony, TXOut of stock

*Not available for California and Restricted States.

This item has to be shipped to a licensed class III dealer. All NFA rules apply.

Inter-Store Transfer

If this item is out of stock at your local RifleGear but available at our other location, no problem. Just place your order and select In-Store Pickup as the shipping method. As long as the item is legal in your location, we will transfer the item for you. You will be notified by email once your item has arrived at the destination.

The Polonium is offered in both standard and K variants and is a quiet, duty rated, hard use 5.56 suppressor. The Polonium K is slightly louder but is lighter, shorter and lower back pressure attributes.

The unique design is due to the external weight reduction, removing all unnecessary material without sacrificing strength. The result is a 10% more surface area and lower weight for faster heat dissipation.

The Polonium uses a 6mm bore and is compatible with 6mm/.243 cartridges. An integrated internal and external flash hider offers superior signature reduction when using night vision. The Polonium uses the industry standard 1.375x24 rear threads for various mounting systems.

Caliber 5.56
Material H900 Heat Treated 17-4 Stainless Steel
Length 4.8"(no mount)
Outer Diameter 1.625"
Weight 11.5 oz(no mount)
dB 137 dB on 11.5" 5.56 SBR
Mount 1.375x24 Threads, 1/2-28 Direct Thread Adapter


Barrel length restrictions
7.5” – 5.56/223 and 7.62×39
10.5” – 6 ARC, 6.5 Grendel and other similar cartridges
12.5” – 308, 6.5 creedmoor, 6mm creedmoor, 243 winchester and other similar cartridges
16” – 300 win mag, 7mm rem mag, 300 PRC and other similar cartridges
18” – 300 RUM and 300 Norma mag
Full auto rated – Responsible belt fed rated on 16” 5.56 belt fed machine guns. Do not exceed 300 round strings without cool down.

*IMPORTANT NOTE* These are the listed barrel length restrictions for all of the Polonium series (Pol, Pol-K, Pol-30). You CANNOT shoot 6.5 or 7.62 projectiles through the 5.56 Polonium or Polonium-K. Meaning the 16” 300 win mag restriction applies to the polonium-30 and not the polonium 5.56 because you cannot shoot 300 win mag through the 5.56 suppressor. You would think something like that doesn’t need to be said but you’d be surprised.

*Not available for California and Restricted States.

This item has to be shipped to a licensed class III dealer. All NFA rules apply.

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