20" 243 Winchester Upper with 4150 Chrome Moly HBAR Barrel, 1:8 Twist and 15" M-LOK Rail
This 20" 243 Winchester upper features a 4150 chrome moly steel HBAR barrel with a parkerized finish and 1:8 twist rate. Built around a DPMS Gen 1-pattern AR-10 upper receiver, the assembly combines a rifle-length gas system, 15" free-float M-LOK handguard, and A2 flash hider. The 243 Winchester cartridge is widely used for varmint hunting, predator hunting, deer hunting, and target shooting. Each upper is assembled in Texas and individually checked for proper headspace using Manson GO and NO-GO gauges.
Quick Glance:
Caliber: 243 Winchester
Platform: AR-10 - DPMS Gen 1 Pattern
Barrel Length: 20 inches
Barrel Material: 4150 Chrome Moly Steel
Barrel Profile: HBAR
Barrel Finish: Parkerized
Twist Rate: 1:8 Twist
Barrel Extension: DPMS Pattern with .308 Feed Ramps
Gas System: Rifle Length
Handguard Length: 15 inches
Handguard Type: Gen 3 Free-Float M-LOK
Upper Receiver: DPMS Gen 1 7075-T6 Billet Aluminum
Gas Block: .750" Low Profile Nitride
Muzzle Threads: 5/8x24
Muzzle Device: A2 Flash Hider with Crush Washer
Headspace Checked: Yes - Manson GO and NO-GO Gauges
Assembly: Fully Assembled in Texas
Full Details:
Upper Receiver:
DPMS Gen 1-pattern AR-10 upper receiver machined from 7075-T6 billet aluminum with forward assist and dust cover assembly installed. Features a matte black MIL-A-8625 Type III, Class 2 hard coat anodized finish. The 7075-T6 aluminum construction provides greater strength than commonly used 6061 billet aluminum.
Barrel:
20" 243 Winchester barrel manufactured from 4150 chrome moly steel with an HBAR profile, parkerized finish, and 1:8 twist rate. Features 5/8x24 muzzle threads and a DPMS-pattern barrel extension with .308 feed ramps. Each barrel is individually checked for proper headspace using Manson GO and NO-GO gauges.
Handguard:
Gen 3 15" extended rifle-length narrow-profile AR-10 free-float M-LOK handguard manufactured from 6061 aircraft-grade aluminum. M-LOK attachment slots are positioned along the 3, 6, and 9 o'clock positions, providing mounting space for compatible accessories. Features a matte black MIL-A-8625 Type III, Class 2 hard coat anodized finish.
Gas System:
Rifle-length gas system paired with a .750" low-profile gas block featuring a nitride finish.
Muzzle Device:
A2 flash hider installed with a crush washer on 5/8x24 muzzle threads.
Compatibility:
Designed for DPMS Gen 1-pattern AR-10 platforms, including compatible configurations from DPMS, PSA, Bushmaster, CMMG, and New Frontier Armory. Not compatible with the listed Armalite, Rock River Arms, or Anderson Manufacturing configurations. AR-10 receiver dimensions vary by manufacturer and model, so compatibility should be verified against the specific lower receiver.
Included Components:
The assembly includes the DPMS Gen 1-pattern upper receiver, 20" 4150 chrome moly steel HBAR barrel chambered in 243 Winchester, 15" Gen 3 M-LOK handguard, rifle-length gas system, .750" gas block, and A2 flash hider.
Important:
This upper receiver assembly is not classified as a firearm when sold separately and does not require an FFL transfer under federal law. Applicable state and local restrictions may vary.
Ballistic Barn AR-10 upper assemblies are assembled in Texas using components manufactured for large-frame AR platforms. Each barrel is individually checked for proper headspace using Manson GO and NO-GO gauges before shipment.
