Chiappa Firearms Mfour-22 Gen Ii Pro 22Lr 16 Adj Stk 28R

The Chiappa Firearms M4-22 Gen II Pro is a semi-automatic .22 LR rifle built on genuine AR platform ergonomics and controls. If you've trained on an M4 carbine or own AR rifles in larger calibers, the M4-22 Gen II Pro lets you run the same manual of arms, trigger discipline, and handling in a caliber that's cheap to shoot and legal at indoor ranges where centerfire rifles aren't permitted. With a 16-inch barrel, adjustable six-position stock, and standard AR controls and dimensions, it's equally at home for backyard plinking, low-cost marksmanship practice, or introducing new shooters to the platform.

The rifle ships with a removable carry handle, flat-top Picatinny rail, and A2-style front sight post for immediate use out of the box. The 28-round magazine capacity (shipped with two mags) means you'll spend less time reloading and more time on target—a real advantage for volume training. At 5.7 pounds and an overall length of 34.3 inches, the M4-22 handles like a true carbine, not a scaled-down toy.

Because the M4-22 Gen II Pro uses MIL-SPEC dimensions and mounting, many standard AR aftermarket parts—grips, two-piece handguards, triggers, and rail systems—fit directly without modification. That means you can customize and tailor the rifle to your preferences as your needs evolve. Whether you're running drills, teaching fundamentals, or just enjoying high-volume practice sessions without breaking the bank, the Chiappa M4-22 Gen II Pro delivers genuine AR rifle ergonomics in a .22 package.

Key Features

• Semi-automatic .22 LR rifle with AR-platform ergonomics and controls
• 16-inch barrel with matte black finish
• Adjustable six-position polymer stock for length-of-pull customization
• 28-round magazine capacity (two magazines included)
• Removable carry handle and flat-top Picatinny rail for optics mounting
• A2-style front sight post for immediate use
• Manual safety
• MIL-SPEC compatible—fits most AR aftermarket grips, handguards, and accessories
• Polymer/steel/alloy construction

Specifications

Frequently Asked Questions

Can I use standard AR rifle parts and accessories on the M4-22 Gen II Pro?

Yes. The M4-22 Gen II Pro uses MIL-SPEC dimensions and mounting, so most AR aftermarket components fit directly—including grips, two-piece handguards, and trigger groups. Check fit before purchase, but the rifle is designed for AR compatibility.

Is the M4-22 Gen II Pro suitable for indoor range training?

Absolutely. The .22 LR cartridge is legal at most indoor ranges that prohibit centerfire rifles, and the low noise and recoil make it ideal for supervised training and practice. The AR ergonomics let you maintain muscle memory between centerfire and .22 training sessions.

What comes in the box with the rifle?

The M4-22 Gen II Pro ships with the rifle, two 28-round magazines, a removable carry handle, and a flat-top Picatinny rail with A2-style front sight post installed.

Can I mount a scope or red dot on the M4-22 Gen II Pro?

Yes. The rifle features a flat-top Picatinny rail, so any standard rail-mounted optic—scopes, red dots, or magnifiers—will fit directly onto the platform.