Smith & Wesson M&P-10 .308 Win AR-10 Semi-Auto, 18-inch 5R Barrel, Folding Sights, 20+1 Capacity
This Smith & Wesson M&P-10 pairs .308 Winchester performance with an 18-inch barrel featuring 5R rifling and a 1:10 twist. It uses a direct-impingement system on the AR-10 platform, with 7075-T6 aluminum receivers and a hard-coat anodized finish. A flat-top Picatinny receiver rail with T-markings, a railed gas block, and installed polymer folding sights add practical versatility, while the threaded barrel wears an open four-prong flash hider. It feeds from SR-25/AR-10 pattern magazines and includes one 20-round PMAG.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are scuffs and scratches throughout. The left side of the safety selector is missing; the selector remains functional. The muzzle device shows discoloration.
What’s Included
- Smith & Wesson M&P-10 .308 Win rifle
- 1x 20-round Magpul PMAG LR/SR 7.62 polymer magazine
- Polymer folding front sight (installed)
- Polymer folding rear sight (installed)
The 18-inch barrel is rollmarked ".308 WIN 1/10 5R," highlighting the rifling profile and twist rate chosen for .308 Winchester. The barrel is threaded and fitted with an open four-prong flash hider. The combination of 5R rifling and a 1:10 twist supports a wide range of .308 loads while maintaining a smooth, consistent bore finish.
The receivers are 7075-T6 aluminum with a hard-coat anodized finish and factory markings that include the S&W logo and "SMITH & WESSON SPRINGFIELD, MA MADE IN U.S.A." The upper features a forward assist, case deflector, and ejection-port dust cover. A flat-top Picatinny receiver rail with T-markings (T2–T14) provides a consistent reference along the top of the upper.
Furniture includes a 6-position, collapsible CAR-style stock with a 13.25-inch length of pull and an A2-style pistol grip. The two-piece, carbine-length polymer handguard has ribs and ventilation holes and is retained by a delta ring. A railed gas block sits ahead of the handguard and hosts the included polymer folding front sight; a matching folding rear sight sits on the receiver.