10.5" 338 ARC Complete Upper with Chrome Moly HBAR Barrel, BCG, Charging Handle and 10" M-LOK Rail
The 338 ARC was engineered to deliver outstanding energy and suppressed performance from the AR-15 platform while maintaining excellent reliability with both subsonic and supersonic ammunition. Designed around modern heavy-caliber projectiles, the 338 ARC offers exceptional terminal performance for hunting, tactical applications, and suppressed shooting. This 10.5" 338 ARC complete upper features a durable chrome moly HBAR barrel, pistol-length gas system, A2 flash hider, lightweight 10" free-float M-LOK handguard, Mil-Spec M16-profile bolt carrier group, and a 7075 aluminum charging handle, making it an outstanding choice for anyone building a compact 338 ARC AR-15 rifle or upgrading an existing firearm.
Quick Glance:
Caliber: 338 ARC
Platform: AR-15
Barrel Length: 10.5 inches
Barrel Material: 4150 Chrome Moly Steel
Barrel Profile: HBAR
Barrel Finish: Parkerized
Twist Rate: 1:8 Twist
Gas System: Pistol Length
Handguard Length: 10 inches
Handguard Type: Lightweight Free-Float M-LOK
Upper Receiver: Forged 7075-T6 Mil-Spec AR-15 Upper
Gas Block: .750" Low Profile
Muzzle Threads: 5/8x24
Muzzle Device: A2 Flash Hider
Bolt Carrier Group: Included – Mil-Spec M16 Profile Nitride BCG
Charging Handle: Included – AR-15 Mil-Spec 7075 Aluminum
Headspace Checked: Yes – Manson GO and NO-GO Gauges
Assembly: Fully Assembled and Ready to Install
Full Details:
Upper Receiver:
AR-15 Mil-Spec forged aluminum upper receiver with forward assist and dust cover assembly installed. Forged from durable 7075-T6 aluminum and protected with a matte black MIL-A-8625 Type III, Class 2 hard coat anodized finish. The 7075-T6 construction provides greater strength than commonly used 6061 billet aluminum.
Barrel:
10.5" 338 ARC barrel manufactured from durable 4150 chrome moly steel with an HBAR profile, Parkerized finish, and 1:8 twist rate. Features 5/8x24 muzzle threads, a standard AR-15 barrel extension with 30 Cal. feed ramps, and is professionally headspaced using Manson GO and NO-GO gauges. The pistol-length gas system provides reliable cycling with both subsonic and supersonic 338 ARC ammunition, making this complete upper an excellent option for suppressed shooting, hunting, and defensive applications.
Handguard:
Premium lightweight 10" Mid Length narrow-profile AR-15 free-float M-LOK handguard. M-LOK slots along the 3, 6, and 9 o'clock positions provide ample room for mounting optics, lights, lasers, grips, bipods, sling attachments, and other M-LOK compatible accessories. Machined from 6061 aircraft-grade aluminum and protected with a matte black MIL-A-8625 Type III, Class 2 hard coat anodized finish.
Gas System:
Pistol-length gas system paired with a .750" low-profile gas block. The pistol-length gas system is optimized to provide dependable cycling across a wide range of 338 ARC ammunition while maintaining smooth operation in both suppressed and unsuppressed configurations.
Muzzle Device:
A2 flash hider installed to reduce visible muzzle flash while protecting the barrel's 5/8x24 muzzle threads.
Bolt Carrier Group:
Mil-Spec M16-profile bolt carrier group with a durable nitride finish. Features a 9310 steel magnetic particle inspected (MPI) bolt and tool steel extractor for dependable reliability. The bolt is professionally headspaced with the barrel using Manson GO and NO-GO gauges to help ensure proper fit and reliable performance.
Charging Handle:
AR-15 Mil-Spec charging handle precision machined from lightweight and durable 7075 aluminum for dependable operation and long service life.
Magazine Recommendation:
For best performance, Ballistic Barn recommends using 400 Legend magazines with all 338 ARC uppers to maximize feeding reliability.
Headspace Checked:
Every complete upper is professionally headspaced using Manson GO and NO-GO gauges to help verify proper chamber dimensions, dependable function, and outstanding accuracy.
Ready to Install:
This complete upper arrives fully assembled with the bolt carrier group and charging handle installed. It is ready to attach to any standard Mil-Spec dimension AR-15 lower receiver.
Important:
This product is not a firearm and will be shipped directly to you. No FFL transfer is required.
Ballistic Barn AR-15 complete uppers are American made and machined by manufacturers specializing in Mil-Spec AR-15 components. Every complete upper is professionally headspaced using Manson GO and NO-GO gauges to help ensure proper fit, dependable function, and outstanding accuracy.
