Rock Island TM22-A-20 | .22 LR | 20″ Barrel

The Rock Island Armory TM22 (MFG#: TM22-A-20) is a full-size semi-automatic rimfire rifle built on a metal platform intended for general recreational and training use. It features a 20″ rifled, threaded barrel, an aluminum fixed stock and M-LOK handguard, and a Picatinny top rail for optics. This configuration makes the TM22 suitable for rimfire training and small-game/varmint shooting where a stable, metal-bodied platform and accessory compatibility matter. A practical optic under $1,000 that pairs well with this rifle is the Vortex Crossfire II 2-7×32, which provides magnification and durability appropriate for rimfire ranges.

Product Specifications

• The manufacturer part number is TM22-A-20.
• The caliber is listed as .22 LR.
• The action is specified as Semi-Automatic.
• The barrel measures 20 inches and is described as fully rifled.
• The barrel muzzle is described as threaded.
• The receiver and major metal components are made from 7075-T6 aluminum.
• The finish is described as black anodized.
• The rifle includes a fixed aluminum stock and an AR-style pistol grip.
• The handguard is specified as M-LOK and the top rail as Picatinny.
• The package includes 2 magazines.
• Sights are reported as not included.
• The listed overall length is 36 inches.
• The product is described for recreational shooting and training applications.
• The trigger style is noted as a flat trigger.
• The UPC is 812285026176.

The TM22 presents a solid-feeling rimfire option with a full-length metal chassis and common accessory interfaces. Its threaded, rifled 20″ barrel and Picatinny rail make it straightforward to fit a scope or optic for deliberate rimfire work, and the M-LOK forend supports modular accessory placement for range use. Whether you want a durable platform for practice or a stable rimfire for varmint work, the TM22’s metal construction and accessory compatibility are practical advantages in the field.

Owners commonly praise the platform’s robust 7075-T6 aluminum construction and its ambidextrous/convertible control set as notable strengths.

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