Ruger AR-556 MPR (Model 8514) 5.56 NATO Semi-Auto Rifle, 18 in Cold Hammer-Forged Nitrided Barrel, Rifle-Length Gas, 15 in Free-Float M-LOK
This Ruger AR-556 MPR stands out with an 18 in medium-profile barrel that is cold hammer forged, nitrided, and threaded 1/2-28 with a Ruger radial-port muzzle brake. It uses a rifle-length gas system for smooth cycling and pairs a 15 in free-float M-LOK aluminum handguard with flat-top receivers and a continuous 12 o'clock Picatinny rail. The Ruger Elite 452 two-stage trigger is set at approximately 4.5 lb, and the rifle is configured with a Magpul MOE SL stock and MOE pistol grip. Manufactured in 2020 in the USA, it weighs about 6.8 lb and measures 35.0–38.25 in overall length.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Equipped with a Magpul MOE SL stock and a MOE pistol grip.
What’s Included
- Ruger AR-556 MPR Model 8514 rifle
- One 30-round Magpul PMAG Gen M3 windowed polymer magazine
The 18 in 4140 chrome-moly steel barrel features a 1:8 RH twist and 5-groove rifling to stabilize a wide range of 5.56 NATO projectiles. Its nitrided finish and medium profile add durability while keeping weight manageable, and the threaded muzzle accepts accessories using the 1/2-28 pattern.
A rifle-length gas system supports reliable function and a pleasant recoil impulse. Ruger equips this model with a radial-port muzzle brake to help control muzzle movement during rapid strings.
The upper and lower receivers are 7075-T6 forged aluminum with a Type III hard-coat anodized black finish, matched to a 15 in free-float aluminum M-LOK handguard. Flat-top receivers and the continuous 12 o'clock Picatinny rail simplify mounting optics and accessories, and the rifle includes a forward assist and dust cover.
The Ruger Elite 452 two-stage trigger breaks at approximately 4.5 lb, providing a clean, predictable pull. Furniture includes a collapsible 6-position Magpul MOE SL stock on a Mil-Spec buffer tube and a Magpul MOE grip. Capacity is 30+1, sights are not included, and safety is managed by a manual selector.