The Maxim Defense MS-9 modular 9mm suppressor is a pistol-caliber can that you configure short or long to suit the host (Maxim Defense part no. MXM-48217). Maxim describes it as equally at home on pistols or PCCs, with no barrel length restrictions regardless of your rate of fire, and it disassembles with common garage tools.

Key Specifications

• The caliber is 9mm, in a pistol-type suppressor.
• The mount is direct thread.
• The design is modular, configurable short or long.
• Length is 5.326 inches short and 7.426 inches long.
• Weight is 7.20 ounces short and 11.7 ounces long.
• Outer diameter is 1.375 inches.
• The tube is 7075 aluminum with steel and aluminum baffles.
• The finish is anodized.
• Maxim lists 136.9 dB at the left ear.
• The firing schedule is full-auto rated, with no barrel restrictions.

Frequently Asked Questions

Can the MS-9 go on both a pistol and a PCC? Yes. Maxim describes it as equally at home on pistols or PCCs, with no barrel length restrictions regardless of rate of fire.

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.

Is the MS-9 a short or long can? Both. It is modular and can be configured short or long, depending on your application.

Buy the Maxim Defense MS-9 Modular 9mm Suppressor for Pistols and PCCs

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. Moving one suppressor between a handgun and a carbine is the point of the MS-9. Order through Maxim Defense‘s suppressors lineup and our Lubbock, Texas team will handle the transfer.