The Smith & Wesson M&P15 Sport in .22 LR is a semi-automatic rifle with an AR-15-style platform scaled for rimfire cartridges. It has a 16.5-inch barrel, 25-round magazine, and weighs 4.9 lbs. The stock is a MAGPUL MOE SL that adjusts for length of pull. Front and rear sights are Magpul MBUS folding units. The M-Lok handguard accepts accessory mounting without additional tools. 
 

Key Specifications 

• Caliber: .22 LR 
• Barrel Length: 16.5 inches 
• Capacity: 25+1 rounds 
• Weight: 4.9 lbs (approximately 78.9 oz) 
• Finish: Matte Black 
• Action Type: Semi-Automatic 
• Overall Length: 33.8 inches 
• Safety Features: Two-position receiver-mounted safety lever 
   

Detailed Features 

• MAGPUL MOE SL Stock: Adjustable for length of pull; accommodates different shooter sizes and positions. 
• Magpul MBUS Folding Sights: Front and rear sights fold flat and deploy quickly; useful when adding an optic as a backup. 
• M-Lok Handguard: Standard M-Lok slots allow lights, grips, and other accessories to mount directly. 
• 25-Round Magazine: Reduces the frequency of reloads during range sessions. 
   

Usage Scenarios 

1. Marksmanship Training: Low-cost .22 LR ammunition makes extended practice sessions accessible; the familiar AR-15 controls transfer directly to centerfire platforms. 
2. Competitive Shooting: Useful for rimfire-specific competitions or informal speed shooting. 
3. Small Game Hunting: .22 LR is effective at reasonable distances for rabbits and squirrels.

The S&W M&P15 Sport .22 LR gets strong marks as a training rifle. The main appeal is straightforward: it looks and handles like an AR-15 but shoots cheap .22 LR ammunition, which makes extended range sessions genuinely affordable. Owners learning fundamentals or transitioning to centerfire AR platforms find it useful.

The 25-round capacity is consistently praised. Reliability gets good marks when using quality ammunition -- most owners report clean cycling and good feeding. The MAGPUL furniture is well-regarded, and the M-Lok handguard adds practical accessory flexibility.

The main criticism is that .22 LR doesn't replicate the felt recoil of centerfire, so it only partially prepares someone for a 5.56mm rifle. Ammunition sensitivity comes up occasionally -- some brands produce more jams or misfires than others in this platform. Customization options exist but are more limited than on full-spec AR-15 lowers. These are understood limitations of the platform rather than defects in the gun itself.