The Mauser M-15 is a .22 LR semi-automatic rifle with a 16.53-inch barrel, 22-round capacity, and a side-folding stock. It weighs 6.45 lbs and has a black finish. 
 

Key Specifications 

• Caliber: .22 LR 
• Action: Semi-Automatic 
• Capacity: 22 rounds 
• Barrel Length: 16.53 inches 
• Weight: 6.45 lbs 
• Finish Color: Black 
   

Features 

 
The adjustable cheekrest lets shooters find a comfortable cheek weld without aftermarket parts. The side-folding stock collapses for transport or storage and locks solidly in the deployed position. Front and rear flip-up sights are built in, so the rifle is ready to shoot without adding an optic. The 16.53-inch barrel keeps the overall package short while providing adequate velocity for a .22 LR. 
 

Usage 

 
The M-15 works well for range sessions, small game hunting, and training. The low recoil of .22 LR makes it practical for extended shooting without fatigue. The 22-round magazine means fewer reloads when shooting for practice or plinking.

The Mauser M-15 in .22 LR gets broadly positive reviews with a few caveats.

Owners appreciate the lightweight build and the practical folding stock, which makes it easy to pack and store. The flip-up sights and adjustable cheekrest are called out as useful touches for the price point. Most users find it accurate and enjoyable to shoot at range distances typical for .22 LR.

Feeding reliability is the most common complaint. Some owners report occasional jams or failures to feed, and the consensus is that it's ammunition-sensitive. Owners who've found a brand it runs well with tend to be happy; those who haven't can be frustrated. Trying several ammunition brands before settling on one is the standard advice in discussions.

Customization options are limited compared to other AR-style .22s, which matters to owners who want to add accessories.

Overall it's considered good value for a .22 LR trainer or plinker, with reliability being the main variable.