The Otter Creek Labs Hydrogen-S 7.62mm suppressor is a 7-inch Grade 5 titanium can for .30 caliber rifles, rated for .308 Winchester (Otter Creek Labs part no. HYDS762). Its tubeless build removes unnecessary material from the outside, which adds surface area for faster cooling and keeps the weight under 10 ounces. The universal 1.375×24 rear thread accepts a wide range of mounts, and a 5/8×24 direct thread adapter comes in the box for rifles with a standard .308 muzzle thread. This listing is the black 7.62mm version.

Key Specifications

• The caliber rating is .308 Winchester, the 7.62mm class this version is built for.
• Length is 7 inches, a mid-length format that balances handling against internal volume.
• Weight is 9.3 ounces, light enough for a hunting rifle that gets carried.
• The body is Grade 5 titanium, a strong, light alloy for a rifle suppressor.
• The rear thread is 1.375×24, the universal HUB pattern that accepts direct thread and quick-detach mounts.
• A 5/8×24 direct thread adapter is included, the common thread on .308 barrels.
• A tube clamp is included, which is used when installing a mount.
• The finish is black, which keeps glare down in the field.

Frequently Asked Questions

What thread does the Hydrogen-S 7.62mm use? The suppressor has a universal 1.375×24 rear thread, and it ships with a 5/8×24 direct thread adapter for the common .308 muzzle thread.

Is this the 7.62mm or the 6.5mm version? This listing is the 7.62mm version for .308 Winchester rifles. A 6.5mm Hydrogen-S is listed separately.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for suppressors. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply.

Buy the Otter Creek Labs Hydrogen-S 7.62mm Titanium Suppressor, 7-Inch Black

As of October 9, 2026, this suppressor transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through Otter Creek Labs‘s suppressors lineup and our Lubbock, Texas team will handle the transfer.