The Polonium K is built from heat?treated 17?4 stainless steel, giving it the strength and thermal durability required for high?pressure rifle use and demanding firing schedules. Its compact 4.8?inch length and 1.625?inch diameter create a suppressor that maintains excellent maneuverability while still delivering effective sound reduction on 5.56 platforms. The internal construction is optimized for durability and consistent performance, making it suitable for both recreational shooters and those running hard?use carbines. Its rugged design and short profile make it ideal for fast?handling rifles, training setups, and general?purpose carbine applications.

Equipped with a 1.375x24 HUB mount interface and an included 1/2x28 direct?thread adapter, the Polonium K offers broad compatibility across standard 5.56 hosts. Barrel restrictions begin at 7.5 inches, allowing use on shorter systems while maintaining safe operating margins. This model is full?auto rated when used on 16?inch 5.56 belt?fed machine guns with a recommended 300?round string limit. A tube clamp and instruction pamphlet are included to support proper installation and maintenance. Full Auto Rating: Suitable for 16 in 5.56 belt?fed with 300?round string limit. Get this and more for sale from Wild Zebra, the best gun store!

Otter Creek Labs Polonium K Specifications

• Manufacturer: Otter Creek Labs
• Series: Polonium Series
• Model: Polonium K
• Type: Rifle Suppressor
• Caliber Rating: 5.56 NATO
• Compatible Calibers: 5.56 NATO and similar pressure?appropriate small?bore rifle calibers
• Construction Materials: H900 Heat?Treated 17?4 Stainless Steel
• Finish: Cerakote Black
• Overall Length: 4.8 in
• Diameter: 1.625 in
• Weight: 11.5 oz
• Full Auto Rating: Suitable for 16 in 5.56 belt?fed with 300?round string limit
• Included Accessories: Instruction & specs pamphlet, 1/2x28 direct?thread adapter, tube clamp for mounting
• Noise Reduction: Approx. 20–28 dB (typical for compact 5.56 K?length suppressors)