Otter Creek Labs Polonium 5.56 - Silencer 1/2X28 Black

The Otter Creek Labs Polonium 5.56 silencer is a purpose-built 1/2x28 suppressor designed for shooters who need serious sound reduction without compromise on durability or heat management. Built from H900 heat-treated 17-4 stainless steel using a CNC welded tubeless construction, this is a hard-use suppressor that's engineered to handle the demands of tactical training, duty use, and high-round-count shooting. The Polonium isn't built on marketing hype or inflated decibel numbers—its reputation is earned through real-world performance and proven reliability in the field.

The 6mm bore accepts 5.56 NATO and is also compatible with 6mm/.243 cartridges, giving you flexibility across multiple platforms. The integrated flash hider—both internal and external—delivers superior flash reduction whether you're running night vision or shooting in low-light conditions where muzzle flash signature matters. That distinctive external profile isn't just for looks: the weight-reduction design removes unnecessary material while maintaining structural strength, and the result is 10% more surface area (depending on length) for faster heat dissipation and quicker cooldown between strings of fire.

At 5.8 inches long and 13.5 ounces, the Polonium strikes a practical balance for rifles where balance and handling remain important. The rear mounting system uses industry-standard 1.375x24 universal threads, so you can choose the mounting solution that best fits your setup. The 1/2x28 direct-thread adapter comes in the box alongside a tube clamp for easy mount changes and installation.

Key Features

• H900 heat-treated 17-4 stainless steel with CNC welded tubeless construction for durability and reliability
• 6mm bore compatible with 5.56 NATO and 6mm/.243 cartridges
• Integrated internal and external flash hider for superior flash reduction with night vision and in low light
• Weight-optimized external design increases surface area for faster heat dissipation
• Universal 1.375x24 rear threads for flexible mounting options
• Includes 1/2x28 direct-thread adapter and tube clamp

Specifications

Frequently Asked Questions

What cartridges does the Polonium 5.56 work with?

The 6mm bore is rated for 5.56 NATO and is also compatible with 6mm/.243 cartridges, giving you multi-caliber flexibility across rifle platforms.

What mounting options are available?

The Polonium uses industry-standard 1.375x24 universal rear threads, so you can choose from a range of aftermarket mounts to fit your setup. A 1/2x28 direct-thread adapter is included in the box for immediate installation.

What comes in the box?

The package includes the suppressor, a 1/2x28 direct-thread adapter, a tube clamp for easy mount changes and installation, instruction pamphlet, and stickers.

How does the flash hider perform with night vision?

The integrated internal and external flash hider is specifically designed for superior flash reduction when using night vision equipment or shooting in low-light conditions, making it effective for duty and tactical applications.