Otter Creek Labs Polonium K Suppressor

The Polonium is made to be a quiet, duty rated, hard use 5.56 suppressor and is offered in both standard and K length options. If you’re looking for the best size, weight and price to sound performance ratio on the market that you can beat the absolute crap out of then look no further than the Polonium series. We don’t need to make up fake, fancy marketing language or give you padded/deflated dB numbers taken on subpar equipment – the reputation, performance and track record of the Polonium and Polonium-K speak for themselves.

The Polonium uses a 6mm bore that is also compatible with any 6mm/.243 cartridges and has a highly effective built in internal and external flash hider that offers superior flash reduction over the competition when using night vision or when shooting in low light conditions. The unique look comes from external weight reduction, removing all unnecessary material to keep the weight down but still as strong as possible. This results in a suppressor that has 10% more surface area depending on the length that will shed heat and cool down quicker.

The Polonium and Polonium-K features industry standard universal 1.375×24 rear threads so you can pick what mounting system best fits your needs.

If you're running drills, shooting under NODs, or stalking hogs at last light, the Polonium K brings serious performance without adding unnecessary length. At just 4.8 inches, this 5.56K suppressor delivers top-tier sound and flash reduction in a lightweight, hard-use design.

Crafted from 17-4 stainless steel and rated for full-auto use, the Polonium K handles high-volume fire without hesitation. Its erosion-resistant baffle design and 6mm bore make it equally capable on 6 ARC, 6mm Creed, or your favorite .223 rifle. Gas management is improved, too—fewer fumes in your face when you're behind the gun.

An integrated flash hider cuts your visible signature in low light, while HUB-compatible 1.375x24 rear threads let you choose your preferred mounting setup. Whether you're using the included 1/2x28 direct thread or swapping in a QD system, the Polonium K adapts fast.

KEY ATTRIBUTES OF THE OTTER CREEK LABS POLONIUM K

• Lightweight Construction: The OCL Polonium K weighs just 11.5 oz, but packs peak performance and durability.
• Compact Design: With a total length of under 5 inches, you’ll hardly notice it on the end of your rifle.
• Flash Suppression: Reduces pressure and flash to lower your signature in low-light conditions.
• Universal Compatibility: 1.375×24 rear threads make it easy to mount on a variety of setups.
• Competitive Noise Suppression: Delivers top-tier decibel reduction for its size.

TECHNICAL SPECIFICATIONS:

• Length: 4.8"
• Diameter: 1.625"
• Weight: 11.5 oz
• Material: 17-4 Stainless Steel
• Full Auto Rated! 

BARREL LENGTH AND FIRING RESTRICTIONS

• 7.5” – 5.56/223
• 10.5” – 6 ARC
• 12.5” - 6 Creedmoor, 6 Dasher, 243 Winchester and other 6mm cartridges
   

WHAT'S IN THE BOX

• OCL Polonium-K Suppressor
• 1/2x28 Direct Thread Adapter
• Tube Clamp
• Owner’s Manual

NOTE: This item is considered an NFA item. It is the customer’s responsibility to ensure that they are in compliance with NFA regulations as well as any applicable state laws regarding NFA items.