The Otter Creek Labs Hydrogen-L 6.5 Creedmoor suppressor is the long version of the Hydrogen line, a 9-inch titanium can built for PRS shooters and hunters who count ounces. Otter Creek Labs removes unnecessary material from the outside of the tube, which adds surface area so the can sheds heat faster and cools quicker between strings. It threads directly on, with a direct thread adapter in the box, and it is sized for 6.5mm precision and hunting rifles. This listing is the 6.5mm version in black.

Key Specifications

• The caliber rating is 6.5 Creedmoor, the 6.5mm bore this version is sized 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 rifle that gets carried.
• The mounting style is direct thread, with a direct thread adapter included in the box.
• The finish is black, which keeps glare down in the field.

Frequently Asked Questions

What is the difference between the Hydrogen-L and the Hydrogen-S? The Hydrogen-L is the 9-inch long version, while the Hydrogen-S is a 7-inch mid-length can in the same line.

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.

What comes in the box? Otter Creek Labs lists the suppressor, a direct thread adapter, a tube clamp and an owner’s manual.

Buy the Otter Creek Labs Hydrogen-L 6.5 Creedmoor 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, and it ships fast to your Class 3 dealer.