Smith & Wesson M&P-15 Sport III 5.56 NATO — 16 in Armornite 5R Barrel, Mid-Length Gas, Threaded — Upgraded with Crimson Trace Red/Green Dot, M-LOK Foregrip, Sling, and 3x 30-Rd Mags
This Smith & Wesson M&P-15 Sport III stands out as a recent-production AR-15 pattern rifle with a 16 in Armornite-treated, 5R-rifled barrel, a mid-length gas system, and forged 7075-T6 receivers. It comes professionally set up with a mounted red dot, quality sling hardware, and three 30-round magazines, offering a complete, ready-to-use package.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Shows minimal evidence of prior handling. The bore is bright with a mirror-like finish.
What's Included
- Original Smith & Wesson M&P Sport Series cardboard box
- Smith & Wesson Volunteer Series & Sport Series rifle manual
- Crimson Trace red-dot sight (mounted)
- Picatinny riser mount for the red dot (installed)
- Padded two-point sling (installed)
- M-LOK QD sling socket with push-button swivel (installed on handguard)
- Polymer vertical foregrip, M-LOK direct-mount (installed)
- 3x 30-round polymer AR-15 magazines (mix of Magpul PMAG and Mission First Tactical MFT MOD II, all marked 5.56x45)
The Sport III configuration features a mid-length gas system paired with a 16 in Armornite-treated barrel, 5R rifling, and a 1:8 twist. The barrel is threaded and fitted with an A2-style flash hider.
Forged 7075-T6 receivers with a removable GI-style polymer trigger guard. The flat-top upper carries a T-marked Picatinny rail, with forward assist, ejection-port cover, and shell deflector present. A 15 in free-float aluminum M-LOK handguard provides a full-length 12 o'clock Picatinny rail. No iron sights are included.
The bolt carrier group is HP/MPI tested and built with a Carpenter 158 bolt, 8620 carrier, chrome-plated firing pin, and a properly staked gas key. The rifle accepts standard AR-15 pattern magazines and ships with three 30-round polymer examples.
Furniture includes a black polymer, 6-position collapsible stock and an A2-style pistol grip. An M-LOK vertical foregrip is installed, along with an M-LOK QD sling socket and padded two-point sling. Crimson Trace Red/Green Red Dot Sight installed.
Receiver markings read Smith & Wesson, Maryville, TN, Made in U.S.A., underscoring domestic manufacture and assembly.

