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AR-STONER AR-15 A3 Upper Receiver Assembly 350 Legend 16″ Barrel with 15″ M-LOK Ultralight Handguard



Product Information

Color Black
Finish Anodized
Material Aluminum
Weight 3.9 Pound
Barrel Length 16 Inches
Twist 1:16 Inches
Threads 5/8″-24
Barrel Contour M4
Barrel Finish Parkerized
Chrome Lined No
Gas Block Diameter 0.75 Inches
Gas System Length Carbine
M4 Feed Ramps Yes
Upper Receiver Type A3 Flat-Top
Barrel Material 4150 Chrome Moly Vanadium Steel
Handguard 15″ M-Lok Ultralight
Bolt Carrier Assembly Included Yes
Muzzle Device Flash Hider
Country of Origin United States of America

Delivery Information

Shipping Weight

5.110 Pounds

Product Overview

MidwayUSA is proud to offer this AR-STONER 350 Legend Upper Receiver Assembly at an exceptional price! This AR-STONER upper features a 350 Legend bolt carrier group, parkerized finish, low profile gas block, and a M4 profile barrel. The A3 upper will attach to virtually any standard AR-15 lower receiver and comes complete with charging handle, forward assist, ejection port cover, A2 flash hider, bolt and bolt carrier assembly. Supplied without a rear sight, this upper is a great platform for a red dot sight or iron sights (both sold separately).


  • 16″ Parkerized 4150 Chrome Moly Vanadium Barrel with 1:16 Twist
  • M4 Contour Barrel
  • 15″ MLOK Rail
  • Rear Charging
  • Carbine Length Gas System
  • .346″ bore with a .355″ groove

Note: this upper receiver does not come with a magazine

Made In United States of America

WARNING: Cancer and Reproductive Harm –


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