The Otter Creek Labs Lithium 9 suppressor is a titanium 9mm can for pistol-caliber carbines, submachine guns and handguns (Otter Creek Labs part no. LIT9). Internal venting is aimed at port pop on direct blowback hosts, and the 1.375×24 HUB rear thread accepts a wide range of mounts. A 1/2×28 direct thread mount comes with it for the common 9mm barrel thread. This listing is the black version.

Key Specifications

• The caliber is 9mm, the pistol cartridge this suppressor is built around.
• Length is 6 inches, compact enough for a pistol-caliber carbine.
• The body is titanium, which keeps weight low on a light carbine.
• The rear thread is 1.375×24, the HUB pattern that accepts a wide range of mounting systems.
• A 1/2×28 direct thread mount is included, the common 9mm barrel thread.
• Internal venting is built in to reduce port pop on direct blowback firearms.
• The finish is black, which matches most carbines and handguns.

Frequently Asked Questions

How does the Lithium 9 mount? It has a 1.375×24 HUB rear thread, and a 1/2×28 direct thread mount is included for 9mm barrels with the common thread.

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 is it built for? It is a 9mm suppressor for pistol-caliber carbines, submachine guns and handguns, with internal venting to reduce port pop on direct blowback hosts.

Buy the Otter Creek Labs Lithium 9 Suppressor, 9mm Black Titanium

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.