FREE STANDARD SHIPPING ORDERS $250+
AGE VERIFICATION REQUIRED
Are you at least 18 years old?
Are you at least 18 years old?
The Otter Creek Labs Polonium K Suppressor - FDE is a professional-tier, ultra-compact rifle silencer custom-engineered to deliver elite signature reduction and unmatched durability on hard-use tactical platforms and short-barreled rifles (SBRs). Now available in a highly resilient Flat Dark Earth (FDE) Cerakote finish, this model seamlessly blends into modern FDE tactical carbines while maintaining absolute field protection against thermal and environmental degradation. Purpose-built to tame the severe muzzle blast, extreme pressures, and harsh acoustic profiles of the 5.56 NATO family, this highly sought-after "K-can" maximizes weapon balance and handling agility without sacrificing structural longevity. The Polonium K achieves its exceptional threshold performance by introducing a high-volume internal chamber layout paired with a custom-engineered progressive baffle matrix and an over-built blast baffle structure. This layout works seamlessly to control extreme gas expansion, producing a deep, comfortable acoustic tone while keeping system backpressure significantly lower than full-sized alternatives, protecting your host weapon's cyclic timing.
Every Polonium K chassis is precision CNC-machined from premium heat-treated 17-4 stainless steel and completely laser-welded into a single, indestructible monolithic block designed to survive rigorous automatic firing schedules. Coated in a high-temperature resistant FDE Cerakote application, it completely locks out environmental degradation and thermal erosion during prolonged field deployment. Designed with an open structural architecture, the backend features the industry-preferred HUB (1.375x24) internal mounting footprint, enabling right-handed and southpaw operators to integrate their choice of quick-detach mechanisms, taper mounts, or standard direct thread adapters instantly. Out of the box, it delivers professional-grade structural longevity because every marksman deserves an uncompromised compact suppression asset.
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.
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.
| SKU | POLO-K-FDE |
|---|---|
| Manufacturer | Otter Creek Labs |
