The GSL Stealth 9mm suppressor is, in GSL’s words, a user-serviceable, full-auto rated can for 9mm pistols and pistol-caliber carbines (GSL part no. S-100-SUP). It is 6.875 inches long, 1.375 inches in diameter and weighs 7.2 ounces, with an aluminum body in a hard coat anodized finish. GSL rates it at 34 dB of reduction and offers a wide spread of mounts for most PCCs on the market. A 1/2×28 direct thread piston comes in the box. It is a light, serviceable choice for a shooter who runs a 9mm pistol and carbine side by side.

Key Specifications

• The caliber is 9mm, for pistols and pistol-caliber carbines.
• Sound reduction is rated at 34 dB by GSL.
• Length is 6.875 inches.
• Diameter is 1.375 inches.
• Weight is 7.2 ounces, light for a full-auto rated 9mm can.
• The body is aluminum with a hard coat anodized finish, a durable and light combination.
• The included mount is a 1/2×28 direct thread piston, with other mounts sold separately.

Frequently Asked Questions

What else can I shoot through the Stealth? GSL says it is also compatible with .300 Blackout (subsonic only), .357 rifle and .38 Special.

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.

Which other mounts does GSL offer? GSL lists a 13.5x1mm LH piston, 1/2×28, 5/8×24 and 9/16×24 options, plus SIG MPX, UZI, Scorpion and MP5 adapters, all sold separately.

Buy the GSL Stealth 9mm Suppressor

A user-serviceable 9mm can with a full-auto rating covers a pistol, a PCC and the occasional subsonic .300 Blackout. 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 GSL Technology‘s silencers and suppressors lineup and our Lubbock, Texas team will handle the transfer as soon as it is available to ship.