The Rock River Arms AR0598.V1 LAR-15M All Terrain Hunter Complete Upper brings a refined .223 Wylde setup to shooters who want accuracy-focused performance in a ready-to-install package. Built on a forged A4 upper receiver, it pairs an 18" heavy match stainless steel barrel with a 13" extended M-LOK free float handguard and an RRA Operator muzzle brake, creating a balanced upper that manages recoil while keeping the sight picture steady.

This complete upper is well suited for range work, varmint and predator hunting, and general training where consistent precision is valued. The cryogenically treated barrel with 1:8 twist stabilizes a wide range of bullet weights, while the low-profile gas block and free float rail help maintain repeatable accuracy. Including both the bolt carrier group and charging handle, it offers a straightforward path to upgrading an existing AR-pattern lower with Rock River Arms’ attention to fit and function.

Key Features:

• Manufacturer: Rock River Arms
• Model: AR0598.V1 LAR-15M All Terrain Hunter Complete Upper
• Caliber: .223 Wylde chamber for 5.56mm and .223 caliber
• Action: .223 Wylde
• Barrel Length: 18" heavy match stainless steel
• Rate Of Twist: 1:8"
• Upper Receiver: Forged A4
• Handguard: 13" extended lightweight free float rail, M-LOK compatible
• Muzzle Device: RRA Operator muzzle brake, 1/2-28 thread
• Includes: Bolt carrier group and charging handle assembly