CHIAPPA M4-22 Gen II Upper Receiver .22LR 16" Barrel 10-Round Capacity

The Chiappa M4-22 Gen II Upper Receiver gives you a practical, affordable way to shoot rimfire on an AR platform you likely already own. Built to standard MIL-SPEC dimensions, this .22LR upper drops onto any compatible lower receiver to create a semi-auto trainer or plinker that handles like the real thing—without the ammo cost or recoil. It's the smart move for shooters who want to log rounds downrange, introduce new shooters to the platform, or simply enjoy trigger time without breaking the bank.

The 16-inch barrel and 10-round magazine capacity make this a handy, maneuverable package for backyard or range work. Fitted with a matte black polymer forend and Mil-Spec M4 front sight, the upper maintains that familiar AR ergonomic and sight picture. At 3.6 pounds, it's light enough to swing naturally, and the combo comes ready to run—you get two 10-round magazines right out of the box, so you can keep shooting without constant reloads.

If you're building a dedicated .22LR trainer, already have a lower receiver sitting idle, or just want to diversify what your current AR can do, this upper is a solid, no-nonsense choice. Steel barrel and polymer construction keep things simple and durable, and there's no learning curve if you know the platform.

Key Features

• Fits any MIL-SPEC AR-15 lower receiver
• 16-inch steel barrel chambered in .22 Long Rifle
• 10-round magazine capacity with two magazines included
• Mil-Spec M4 front sight for quick target acquisition
• Black polymer carbine-length forend
• Lightweight at 3.6 pounds for easy handling
• Matte black finish

Specifications

Frequently Asked Questions

What lower receivers will this upper fit?

This upper receiver is built to MIL-SPEC AR-15 dimensions and will fit any standard MIL-SPEC lower receiver. As long as your lower is milspec-compatible, this .22LR upper will work.

What magazines come with the M4-22 Gen II upper?

Two 10-round magazines are included with your upper receiver, so you can get out and start shooting right away.

Is this a good choice for training or introducing new shooters?

Yes. The .22LR cartridge has minimal recoil and a low report, making it ideal for training, building fundamentals, and letting newer shooters get comfortable with AR ergonomics and controls. You'll also save significantly on ammunition compared to centerfire.

What sights come factory equipped?

The upper includes a Mil-Spec M4 front sight, which gives you a standard AR sight picture right out of the box. You can add a rear sight or optic based on your shooting needs.