Otter Creek Labs Polonium 30

ELEMENT 84 - NOW IN 762!

The Otter Creek Labs Polonium 30 gives you one suppressor for everything from a short-barreled 5.56 to a 300 Norma Magnum. If you want a single can that moves between rifles without compromise, this is it.

Built from H900 heat-treated 17-4 stainless steel in a tubeless design, the Polonium 30 handles full-auto fire on an MK18 and precision work on a bolt gun. The external ribbing increases surface area by 10%, shedding heat faster and cooling down quicker between strings. Internal and external flash hiders reduce visual signature for night vision and low-light shooting.

At 5.8 inches and 13.5 ounces (without mount), the Polonium 30 keeps your rifle balanced while delivering multi-caliber suppression. The 7.62 bore handles calibers from 5.56 NATO through 300 RUM and 300 Norma Magnum.

The Polonium 30 uses 1.375x24 HUB threads, compatible with Dead Air Key-Mo and Xeno, SilencerCo ASR, Q Plan-B, Griffin adapters, YHM Kurz and Phantom, and most other popular mounting systems. The included 5/8x24 direct thread mount gets you shooting immediately.

SPECIFICATIONS

• Length: 5.8" (without mount)
• Diameter: 1.625"
• Weight: 13.5 oz (without mount)
• Material: H900 17-4 Stainless Steel
• Construction: Tubeless, CNC welded
• Bore: 7.62mm (.30 caliber)
• Rear Threads: 1.375x24 HUB
• Max Caliber: 300 RUM, 300 Norma Magnum
• Full-Auto Rated

MINIMUM BARREL LENGTHS

• 7.5" - 5.56 NATO, 7.62x39
• 10.5" - 6mm ARC, 6.5 Grendel
• 12.5" - .308 Win, 6.5 Creedmoor, .243 Win
• 16" - 300 Win Mag, 7mm Rem Mag, 300 PRC
• 18" - 300 RUM, 300 Norma Magnum

WHAT'S INCLUDED

• Polonium 30 suppressor
• 5/8x24 direct thread mount
• Tube clamp for mount installation
• QR code manual link
• Stickers

COMPATIBLE MOUNTING SYSTEMS

• Direct Thread Mounts - Dead Air, SilencerCo, Energetic Armament, YHM
• SilencerCo ASR
• Q Plan-B
• Dead Air Key-Mo
• Dead Air Xeno
• Energetic Armament TBAC Adapter
• Griffin A2 Adapter
• YHM Kurz QD, Phantom QD

COMPARE THE POLONIUM LINEUP

Otter Creek Labs builds three versions of the Polonium to fit different needs. All share the same H900 heat-treated 17-4 stainless steel construction, tubeless design, and 1.375x24 HUB mount compatibility.

Polonium K (4.8" / 11.5 oz) - The compact option. Choose this when overall length and weight matter more than maximum sound reduction. Same 6mm bore as the standard Polonium, same barrel length requirements.

Polonium (5.8" / 13.5 oz) - The balanced option. One inch longer than the K delivers noticeably better sound performance while keeping the 6mm bore for dedicated 5.56 and 6mm cartridge suppression.

Polonium 30 (5.8" / 13.5 oz) - The multi-caliber option. Same size as the standard Polonium but with a 7.62mm bore. Handles everything from 5.56 NATO through 300 RUM and 300 Norma Magnum. Trade-off: slightly less 5.56 suppression than the dedicated 6mm bore models.

WHICH POLONIUM SHOULD YOU BUY?

Choose the Polonium if:

• You shoot primarily 5.56/.223 or 6mm cartridges
• You want the best 5.56 suppression in the lineup
• You don't need .30 caliber compatibility
• One inch of additional length over the K is acceptable

Choose the Polonium K if:

• Minimal added length is your priority
• You're running a short-barreled rifle and every inch counts
• Weight savings of 2 oz matters for your application
• You're willing to trade some suppression for compactness

Choose the Polonium 30 if:

• You want one suppressor for multiple rifles in different calibers
• You shoot .308, 6.5 Creedmoor, 300 Win Mag, or larger
• Multi-caliber flexibility outweighs maximum 5.56 performance
• You own rifles in both 5.56 and .30 caliber platforms

All three models share the same HUB mount compatibility, so your muzzle devices and QD systems work across the entire Polonium lineup.