Smith & Wesson M&P-10 .308 Win AR-10 Platform, 18-Inch 4140 Steel Barrel, Threaded, 6R Rifling, Ambi Safety, Black Anodized
This Smith & Wesson M&P-10 in .308 Win stands out with its 18-inch 4140 steel barrel featuring 6R rifling and a 1:10 twist, a flat-top upper with T-marked Picatinny rail, and an ambidextrous safety. It uses SR-25/LR-308 pattern magazines and includes a 20-round Magpul PMAG. The bore condition is excellent, and the rifle shows only light, superficial signs of prior handling.
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: Minor, superficial scratches and small blemishes are present on exterior surfaces from light handling. The bore is bright with a mirror finish.
What’s Included
- Smith & Wesson M&P-10 .308 Win semi-automatic rifle
- 1x 20-round Magpul PMAG LR/SR GEN M3 polymer magazine (SR-25 pattern)
The 18-inch barrel is marked ".308 WIN 1/10 6R" and is threaded at the muzzle with a multi-slot flash suppressor. The 6R rifling profile and 1:10 twist rate are well-suited to common .308 Win loads, and the bore presents in excellent condition.
The rifle uses a direct-impingement, gas-operated system. The upper is a flat-top design with a T-marked Picatinny rail (indexed S&W, T2–T14) for mounting optics or accessories. A railed gas block and a two-piece vented polymer handguard with a short accessory rail at 6 o’clock provide straightforward mounting options.
The receivers are 7075-T6 aluminum with a hard-coat black anodized finish. Controls include an ambidextrous safety selector. Furniture consists of a collapsible polymer stock and a Magpul polymer pistol grip for a solid, serviceable interface.
Markings include the Smith & Wesson crest and "SMITH & WESSON, SPRINGFIELD, MA, MADE IN U.S.A." The rifle accepts SR-25/LR-308 pattern magazines and comes with a 20-round Magpul PMAG LR/SR GEN M3.
Sights are not included, allowing the user to configure the rifle with their preferred sighting system on the integral top rail and gas block rail.




