The ISSC M22 Omni is a .22 LR semi-automatic pistol with a single/double action trigger, a 4.5-inch barrel, and a 10-round magazine. The frame is black composite and the slide is alloy steel, finished in matte black. Total weight is 1.1 lbs (17.8 oz). 
 

Key Specifications 

• UPC: 713440970672 
• Caliber: .22 LR 
• Action: Single/Double Action 
• Capacity: 10 Rounds 
• Barrel Length: 4.5 inches 
• Weight: 1.1 lbs (17.8 oz) 
• Finish: Matte Black 
• Frame Material: Black Composite 
• Slide Material: Alloy Steel 
   

Features 

The single/double action system gives the shooter flexibility: the first shot can fire from double-action (long, heavier pull) or the hammer can be cocked manually for a lighter single-action pull on subsequent shots. The composite frame keeps weight down while the alloy steel slide provides a more solid lockup than an all-polymer design. 
 
At 4.5 inches the barrel is longer than most compact carry pistols, which aids velocity and sight radius without making the gun unwieldy. Ten rounds plus one in chamber is a practical capacity for plinking and training. .22 LR ammunition costs are low, which encourages frequent practice.

The M22 Omni gets consistent praise for its lightweight build and the matte black finish. Users who primarily plink or train on a budget find it a good value. Recoil is minimal at .22 LR, which makes it approachable for beginners.

Reliability is the main area of concern. Occasional jams and misfires come up in multiple reviews, which some owners attribute to ammunition sensitivity. Ergonomics are debated — the grip works for some hands and not others. Accuracy at close range is generally considered adequate, though some shooters find it falls short at longer distances. Compared to higher-priced .22 pistols, the M22 Omni's durability draws more skepticism, though most budget-tier buyers find it acceptable for casual use.