--- title: "Otter Creek Labs Black Polonium-K 5.56 Suppressor" description: "Black 5.56 NATO suppressor measuring 4.8\" and weighing 11.5 oz. Features H900 heat-treated 17-4 stainless steel and 1.375x24 rear threads." canonical_url: "https://www.kygunco.com/product/otter-creek-labs-polk-polonium-k" meta: author: KYGUNCO "og:description": "Black 5.56 NATO suppressor measuring 4.8\" and weighing 11.5 oz. Features H900 heat-treated 17-4 stainless steel and 1.375x24 rear threads." "og:image": "https://cdn.kygunco.com/assets/products/241963/thumbnail.jpg?v=1713455824" "og:image:height": "500" "og:image:width": "500" "og:title": "Otter Creek Labs Black Polonium-K 5.56 Suppressor" --- > Index of every page on this site: [llms.txt](https://www.kygunco.com/llms.txt) [Home](https://www.kygunco.com/) / [Shooting](https://www.kygunco.com/category/shooting) / [Guns](https://www.kygunco.com/category/shooting/guns) / [Class III](https://www.kygunco.com/category/shooting/guns/class-iii) / [Suppressors](https://www.kygunco.com/category/shooting/guns/class-iii/suppressors) / TTR-POLK ![Main product image](https://static.kygunco.com/cdn-cgi/image/f=auto,w=600/assets/products/241963/main.jpg?v=1713455824) For illustration purposes only, this image may not be an exact representation of the product. # OTTER CREEK LABS Polonium-K 5.56 NATO 4.8" Silencer / Suppressor | Black The Otter Creek Labs Polonium-K is a compact 5.56 NATO suppressor measuring 4.8" long and weighing 11.5 oz. Its H900 heat-treated 17-4 stainless steel construction includes built-in internal and external flash hiders, a 6mm bore compatible with 6mm/.243 cartridges, and universal 1.375x24 rear threads. Includes a 1/2x28 direct-thread adapter and tube clamp. 5.0 ** ** ** ** ** [2 reviews](#reviews) $522 ** 5 interest-free payments of **$104.40** with ![Sezzle logo](https://www.kygunco.com/brands/sezzle.svg) ** Online In Store ** Free Shipping Enjoy delivery to the Lower 48 States at no cost. ** NFA / Class 3 NFA transfer requirements vary by product and location. Additional documentation, approvals, or a qualified dealer may be required. Check local and state regulations to ensure eligibility and compliance before purchasing. ** Ships To FFL Dealer Handled by our expert shippers in Bardstown, KY. ** Check Local Restrictions Not sure whether this item can be shipped to your area? Enter your ZIP code for a quick check. Item # 241963 Style TTR-POLK UPC 664533654156 Condition New Manufacturer [Otter Creek Labs](https://www.kygunco.com/brand/otter-creek-labs) Model POLONIUM-K Finish Black Caliber 5.56 NATO Weight 2 lb Action Silencer The polonium is made to be a quiet, duty rated, hard use, 5.56 suppressor. Just as much at home on a mk18 getting hammered with heavy strings of fire as it is on a DMR/SPR set up where ultimate suppression is the goal. 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 and a lower weight that sheds heat faster and cools down quicker. The polonium is made in both standard and K configuration. While the K version is slightly louder it is also: lighter, shorter and lower back pressure. The polonium uses a 6mm bore that is compatible with any 6mm/.243 cartridges. The highly effective built in internal and external flash hider offer superior flash and signature reduction over the competition when using night vision. The Polonium features industry standard universal 1.375x24 rear threads so you can pick what mounting system best fits your needs. - Length: 4.8", Weight: 11.5 oz, OD: 1.625" - Made from H900 heat treated 17-4 stainless steel - Includes: Instruction and specs pamphlet, 1/2x28 direct thread adapter & Tube clamp for installing mounts - Cerakote Finish, Black Shop with KYGUNCO for the best selection, competitive pricing, and exceptional customer service. Experience the difference that comes with buying from a trusted outdoor retailer with over 20 years of experience in the industry. ** WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov). ## Frequently Bought Together 5.0 ** ** ** ** ** 2 reviews ** ** ** ** ** 2 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ** ** ** ** ** 0 ## Reviews ** James Bardstown, KY Great performance at a reasonable price! My new go to suppressor brand. 5 days ago ** ** ** ** ** ** George Salvisa, KY Great suppressor, like how it's built to up to 6mm. bought for my .243 and 6 ARC.and as always a pleasure doing business at KY gn co. last week ** ** ** ** ** ## Don't Forget Your Ammo ```json {"@context":"https://schema.org","@graph":[{"@id":"https://www.kygunco.com/#website","@type":"WebSite","description":"Shop KYGUNCO for firearms, ammo, accessories, parts, and outdoor gear at low prices with fast, easy nationwide shipping.","name":"KYGUNCO","url":"https://www.kygunco.com/","publisher":{"@id":"https://www.kygunco.com/#/schema/organization/kygunco"}},{"@id":"https://www.kygunco.com/product/otter-creek-labs-polk-polonium-k#webpage","@type":"WebPage","description":"Black 5.56 NATO suppressor measuring 4.8\" and weighing 11.5 oz. 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