Otter Creek Labs Polonium K Suppressor

Otter Creek Labs Polonium K Suppressor

Otter Creek Labs Polonium K: Big Performance in a Short Package

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

SUPPRESSOR PURCHASE INFORMATION

Effective October 9, 2026, ATF's updated enforcement policy no longer requires mandatory NFA Form 4 approval or registration for suppressor transfers. All purchases remain subject to Form 4473, applicable background checks, and federal and state laws. Policies are subject to change.

* I ACKNOWLEDGE THAT THIS PRODUCT IS REQUIRED TO SHIP TO AN FFL - I WILL INPUT THE FFL'S SHIPPING ADDRESS AT CHECKOUT OR WE WILL CONTACT YOU FOR YOUR DESIRED FFL/SOT