AR-15 .338 ARC 16" Rifle Kit – 1:8 Twist & LE Stock

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AR-15 .338 ARC 16" Rifle Kit | 1:8 Twist | LE Stock | 6.5 Grendel BCG

Take advantage of the versatility of .338 ARC in the AR-15 platform with the Moriarti 16" .338 ARC Rifle Kit. Built around a 16-inch .338 ARC barrel with a 1:8 twist, this configuration combines a practical rifle-length barrel with the heavy-projectile capability that is driving interest in the .338 ARC cartridge.

The kit is paired with a 6.5 Grendel-pattern bolt carrier group, providing the appropriate bolt-face configuration for .338 ARC, and an LE-style adjustable stock for a familiar AR-15 rifle setup.

Unlike the shorter .338 ARC pistol configurations, the 16-inch barrel makes this kit particularly attractive for shooters looking for a versatile .338 ARC rifle for hunting, range use, and both supersonic and subsonic ammunition applications. The 1:8 twist provides a balanced .338 ARC configuration across the cartridge's broad range of projectile weights.

Moriarti combines the listed upper and lower-component groups into one convenient .338 ARC AR-15 rifle kit, eliminating the need to source each component separately. The lower receiver is not included.

For shooters comparing .338 ARC with 300 Blackout, the 16" configuration provides another AR-15 option centered around substantially larger .338-caliber projectiles while retaining the familiar AR-15-size platform.

Key Features

• Caliber: .338 ARC
• Platform: AR-15
• Configuration: Rifle Kit
• Barrel Length: 16"
• Twist Rate: 1:8
• Muzzle Thread: 5/8x24
• BCG: 6.5 Grendel-pattern BCG
• Stock: LE-Style Adjustable Stock
• Lower Receiver: Not included
• Applications: Hunting, range and sporting use
• Ammunition: Compatible .338 ARC ammunition

Why Choose a 16" .338 ARC?

A 16" .338 ARC barrel provides a versatile rifle configuration for shooters who want to use the cartridge across hunting, range, supersonic, and compatible subsonic applications. Compared with shorter .338 ARC pistol configurations, the 16" barrel provides additional barrel length for supersonic ammunition while retaining the AR-15 platform and .338 ARC's heavy-projectile capability.