The Smith & Wesson M&P10 is a .308 Win / 7.62mm NATO gas-operated semi-automatic rifle. At 7.7 lbs with an 18-inch barrel, it sits lighter than many .308 platforms while still running the full cartridge. 
 

Key Specifications 

• Caliber: .308 WIN / 7.62MM NATO 
• Action: Gas Operated Semi-Auto 
• Capacity: 20+1 rounds 
• Barrel Length: 18 inches 
• Overall Length (OAL): 36.9 inches 
• Weight: 7.7 lbs 
• Safety: Ambidextrous Manual Safety 
   

Detailed Features 

The optic-ready upper accepts standard scope mounts and red dots without modification. The 6-position telescoping buttstock adjusts length-of-pull for different shooters and shooting positions. The receiver uses 7075 T6 aluminum and the barrel is chrome-moly, which keeps the weight down while maintaining durability. A flash suppressor muzzle device is fitted from the factory. 
 
Ambidextrous controls make the rifle functional for left-handed shooters without additional parts. 
 

Usage Scenarios 

• Hunting: The .308 Win caliber handles medium to large game at typical hunting distances with the 18-inch barrel. 
• Competitive Shooting: The 20-round magazine and semi-auto action suit practical rifle competitions. 
• Home Defense: Gas-operated semi-auto with a large-capacity magazine provides substantial firepower when needed.

The Smith & Wesson M&P10 .308 Semi-Auto Rifle generates broadly positive reviews from owners who value accuracy and practical versatility.

Accuracy is the most consistent point of praise. Owners describe reliable performance at various distances for both hunting and target work. The gas-operated action cycles cleanly with quality ammunition.

Build quality gets strong marks. The 7075 T6 aluminum receiver and overall construction feel solid, which gives owners confidence in the rifle's long-term reliability.

Ergonomics are well-regarded. The adjustable stock and AR-pattern controls make it intuitive for anyone familiar with that platform, and the grip angle suits most shooters without modification.

Versatility comes up often -- hunters, competitors, and home-defense minded buyers all find something useful in the M&P10's feature set.

Weight draws the most criticism. At 7.7 lbs before optics and accessories, some owners find it heavy relative to other .308 semi-automatics, especially for extended carry.

Accessory and .308 ammunition costs are mentioned as secondary concerns. The optic-ready design helps, but the cost per round for .308 adds up quickly for high-volume shooters.

Some users report early feeding issues with specific ammunition brands, resolved after a break-in period or by selecting preferred loads. Customization options feel narrower to some owners compared to AR-15 platforms, which have a deeper aftermarket.