The Whisperstrike Slim 9 9mm Pistol Suppressor in Flat Dark Earth is a slim pistol can designed to keep factory-height sights fully usable. Its 1.125-inch diameter gives a clear sight picture without suppressor-height sights. It uses a modular two-length design, a 6.25-inch short configuration or an 8.25-inch extended module, and it includes a booster for tilt-barrel pistols.

Key Specifications

• Caliber is 9mm, and the maker also lists .380, .32 ACP and 22LR.
• Diameter is 1.125 inches, slim enough for factory-height sights.
• Length is 6.25 inches short or 8.25 inches extended, with the booster.
• Weight is 6 ounces short or 7.5 ounces extended, with the booster.
• Construction is Ti64V ELI Grade 23 titanium with a Cerakote C-Series finish, and a 1/2×28 booster is included.

Frequently Asked Questions

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.

Can I use it on a fixed-barrel firearm? A direct-thread adapter is sold separately for fixed-barrel platforms. The Slim 9 is not rated for full-auto fire.

Buy the Whisperstrike Slim 9 9mm Pistol Suppressor, Flat Dark Earth

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 Whisperstrike’s suppressors lineup and our Lubbock, Texas team will handle the transfer and it ships fast to your Class 3 dealer.