The Otter Creek Labs Hydrogen K is a compact, lightweight suppressor engineered for .308/7.62 applications. Constructed from grade 5 titanium with a black nitride finish, this 5-inch unit emphasizes reduced mass and rapid cooling without sacrificing durability. It ships with a 5/8-24 direct-thread adapter and a tube clamp for mounting flexibility.
Product Specifications
The caliber is listed as .308 / 7.62 NATO.
The material is grade 5 titanium for strength-to-weight efficiency.
The length is 5.00 inches (suppressor body, no mount).
The outer diameter is 1.625 inches to minimize profile.
The weight is 6.7 ounces (no mount).
The thread pattern for the direct-thread adapter is 5/8-24.
The finish is black nitride for corrosion resistance and low reflectivity.
The product is stated as full-auto rated when used within temperature limits.
The suppressor uses a tubeless construction aimed at saving weight and shedding heat faster.
The manufacturer reports a measured level of 142 dB on a 16″ .308 with BK 2209.
The package includes a 5/8×24 direct-thread adapter for muzzle attachment.
The package includes a tube clamp for installing mounts.
Also included are instruction/specs pamphlet and manufacturer stickers.
The manufacturer part number is HYDK762.
The UPC is 664533654095.
Designed with precision rifle competitors and backcountry hunters in mind, the Hydrogen K balances minimal weight and a small footprint with materials and construction intended for demanding field use. Its tubeless titanium body and included direct-thread adapter make it a practical choice for shooters who need a compact, low-mass suppressor for .308/7.62 platforms.
Owners commonly praise the Hydrogen K for its exceptionally light weight and its effective reduction in perceived noise; many note that it cools quickly under extended strings of fire thanks to the increased external surface area produced by its weight-reduction features.
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