The CMMG Mk4 22 LR suppressed pistol is a package that pairs a Mk4 rimfire pistol with a ZEROED .22 LR suppressor (CMMG part no. 22A5B28BRZ). The pistol has a 4.5-inch barrel, which keeps the whole setup short even with the can installed. It is a semi-automatic .22 LR, so practice ammunition stays cheap and recoil stays negligible. The bronze finish sets it apart from the black guns on the rack. It is a ready-made quiet plinker and training tool for shooters who want the pistol and the can in one purchase.

Key Specifications

• The chambering is .22 LR, the low-cost rimfire round that suits high-volume practice.
• The barrel is 4.5 inches long, keeping the package compact with the suppressor attached.
• The action is semi-automatic, firing one round per trigger pull.
• The platform is CMMG’s Mk4, its AR-15-pattern pistol line.
• The finish is bronze, as the package is listed.
• A ZEROED .22 LR suppressor is included, so the pistol is ready to shoot suppressed.

Frequently Asked Questions

What comes in the package? The CMMG Mk4 .22 LR pistol with a 4.5-inch barrel and a ZEROED .22 LR suppressor.

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.

Buy the CMMG Mk4 .22 LR Suppressed Pistol, 4.5-Inch, Bronze

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 CMMG‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer. Buy the pistol and the can together and the setup is done before it reaches your Class 3 dealer.