AR-STONER AR-15 Competition A3 Upper Receiver Assembly 223 Remington (Wylde) 18" Barrel with 15" M-Lok Handguard

  • Product #: 710765
  • AR-Stoner #: UA794051-(15)MLOKARS(MB)
AR-STONER AR-15 Competition A3 Upper Receiver Assembly 223 Remington (Wylde) 18" Barrel...
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Ships 01/18/2019 from MidwayUSA
Made in USA

Product Overview

1 Year MidwayUSA Exclusive Brand Warranty

MidwayUSA Exclusive Brand Warranty

Designed for competition, the AR-STONER™ AR-15 Competition A3 Upper Receiver Assembly provides the accuracy and reliability you need during a match. The A3 upper will attach to virtually any standard AR-15 lower receiver and comes complete with everything you need to start shooting. This upper features a mid-length gas system, 18” stainless steel 1:8” twist barrel, competition muzzle brake, and a lightweight 15” free float M-Lok Handguard. The M-Lok Handguard slots allow mounting of popular M-Lok compatible accessories directly to precision cutouts and features integrated QD sling mounts with a sleek design that doesn’t sacrifice strength or ergonomics.

Chambered in the popular 223 Wylde, this barrel has a longer throat than the SAMMI spec for 223 Remington. Allowing for safe usage of 5.56x45mm NATO ammo with enhanced reliability. Tighter tolerances also increase the accuracy potential for this barrel.

Be ready for you next match with the AR-STONER™ AR-15 Competition A3 Upper Receiver Assembly.

The AR-STONER™ Competition Muzzle Brake for the AR-15 is designed for 3-Gun competition and shooters looking to reduce muzzle movement and recoil. Threaded 1/2"-28 for 223 Winchester or 5.56x45mm NATO ammunition. The Comp is constructed of steel and features a matte phosphate finish for years of service. With an overall length of 3" and a width of 1" it falls within the specifications for the USPSA Multi-Gun Limited Division, and 3-Gun Tactical Classes. The ports are arranged to maximize the effectiveness of the brake. Three 0.5" lateral ports reduce the felt recoil and three 0.125" top ports to eliminate muzzle rise. The first upper port is situated at the muzzle so the full force of the expanding gas will keep the muzzle down for a very flat recoil profile. The horizontal ports use the larger volume of lower pressure gas to reduce the felt recoil, keeping your sights on target for a fast follow up shot.



  • Complete Bolt Carrier Group
  • 15" M-Lok Handguard
  • 18” Stainless Steel Barrel
  • USPSA Multi-Gun Limited Division Approved Competition Muzzle Brake
  • Chambered in 223 Wylde


Note: Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.

Made In United States of America
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Product Information

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Delivery Information

Must Ship to FFL Dealer Yes
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Ships Alone Yes
Oversized Yes
DOT- Regulated Yes
Carrier Restrictions
  • Cannot ship via air
  • Cannot ship via USPS
  • Cannot ship to PO Box
  • Must ship to Contiguous US
HazMat Product Yes



  • Combining the Upper and Lower
    Combining the Upper and Lower
  • Function Testing
    Function Testing

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