Used Smith & Wesson M&P15 Sport III S&W AR15 16" M&P AR-15 M-LOK +3 MAGS, OG BOX

Smith & Wesson M&P15 S&W M&P AR-15 AR15 +CT OPTICS

How Buying WorksEnding November 10, 2026 at 9:30 PM

Key Features

  • Item Type: Semi Auto Rifles
  • Action: Direct Impingement
  • Manufacturer: Smith & Wesson (S&W)
  • Capacity: 30 1
  • Model: M&P-15
  • Barrel Length: 16"
  • Caliber: 5.56mm NATO
  • Finish: Black
  • Overall Condition: Excellent

Product Description

    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.

Specifications

Item TypeSemi Auto Rifles
ManufacturerSmith & Wesson (S&W)
ModelM&P-15
SubmodelSport III
Caliber5.56mm NATO
Overall ConditionExcellent
Bore ConditionExcellent
ActionDirect Impingement
Capacity30 1
Barrel Length16"
FinishBlack
Stock/GripsA2-style pistol grip
Sight/Opticnone (no iron sights included)
What's IncludedManual
Country of OriginUnited States