The Otter Creek Labs Hydrogen-L .308 Win suppressor is the long 7.62mm version of the Hydrogen line, a 9-inch titanium can for hunters and precision shooters running .30 caliber rifles (Otter Creek Labs part no. HYDL762). Otter Creek Labs cuts weight from the outside of the tube and keeps the strength, so the can runs light and sheds heat quickly. It uses the universal 1.375×24 HUB rear thread, which lets you pick the mount that suits the rifle. This listing is the black .308 version, not the 6.5mm.

Key Specifications

• The caliber rating is .308 Winchester, the 7.62mm class this version is built for.
• Length is 9 inches, the long format of the Hydrogen line for more internal volume.
• The body is titanium, which keeps weight down on a hunting or precision rifle.
• The rear thread is 1.375×24, the universal HUB pattern that accepts direct thread and quick-detach mounts.
• The finish is black, which keeps glare down in the field.
• The model is the Hydrogen-L, the long version of the Hydrogen line.

Frequently Asked Questions

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

What mounting system does it use? It uses a 1.375×24 HUB rear thread, which works with the popular direct thread and quick-detach mounting systems.

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-L .308 Win Suppressor, 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.