Ruger AR-556 MPR 18" 5.56 NATO 1:8 Twist AR-15 Rifle - 15" M-LOK Rail

Manufactured by Ruger
SKU: RUG08514
MPN: 8514
Manufactured by Ruger
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NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.

Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal Firearm License holder.
•Current processing time is approximately 14 to 16 days.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers. Due to Covid-19 many are no longer open
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to



Sturm, Ruger & Co., Inc. has been one of the nation's leading manufacturers of dependable rifles, shotguns, and pistols since 1949.

The Ruger AR-556 MPR Model #8514 is well appointed with forged 7075-T6 aluminum upper and lower receivers, an 18” cold hammer forged 4140 chrome moly vanadium steel barrel, Magpul furniture, and a 15” free float M-LOK handguard. The AR-556 features a Ruger Muzzle Brake with a radial design, a 4.5 lb two stage Ruger Elite 452 AR-Trigger, and 9310 alloy steel, shot peened bolt.

This optic ready AR-15 includes a monolithic Picatinny rail for your choice of red dot, magnified rifle scope, or iron sights. M-LOK slots are available the 3, 6, and 9’o-clock for your favorite lights, lasers, and other accessories.

  • Chambered in 5.56 NATO with a 1:8 twist rate
  • 4140 chrome moly vanadium steel barrel with a black nitride finish
  • Type III hardcoat anodized
  • Includes (1) 30-round magazine
  • Semi-automatic
  • Two stage Ruger Elite 452 AR-Trigger with 4.5 lb pull
  • Optic ready
  • Radial Ruger Muzzle Brake
  • 15” free float M-LOK handguard
  • MIL-SPEC Magpul MOE SL collapsible buttstock
  • Magpul MOE pistol grip
  • Height: 8”
  • Overall length: 35” – 38.25”
  • Length of pull: 11.1” – 14.4”
  • Weight: 6.8 lbs
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Barrel CoatingSalt Bath Nitride
Barrel ContourMedium
Barrel Length18
Barrel LiningSalt Bath Nitride
Barrel Material4140 Chrome Moly Steel
Caliber Gauge5.56 NATO
Gas System LengthRifle
Gas System TypeDirect Impingement
Handguard15 in M-LOK Rail
Muzzle DeviceCompensator
Thread Pattern1/2 X 28
Twist Rate1:8
Weight6.8 lbs

WARNING: Discharging firearms in poorly ventilated areas, cleaning firearms or handling ammunition may result in exposure to lead and other substances known to the State of California to cause birth defects, reproductive harm and other serious physical injury. Have adequate ventilation at all times. Wash hands thoroughly after exposures. For more information, see

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