The Precision Reflex MK12 Mod 0 SPR Gen III 5.56mm 18" BBL 1-7 Twist Upper FDE is a complete upper receiver assembly built around an 18" Douglas 416 stainless steel barrel with a 1-7 twist and threaded muzzle. It pairs a forged 7075-T6 flat-top receiver with PRI’s Gen III rifle-length carbon fiber free float forearm and full-length top rail, delivering a rigid, accurate platform ready to mount optics and accessories.

This upper includes a fitted bolt and carrier, PRI flip-up front gas block sight and matching rear sight, rifle-length gas system, Gas Buster charging handle with big latch, and AE brake and collar. Ideal for precision-focused range work, training, or varmint and predator hunting, it offers smooth handling and dependable performance in a balanced 18" configuration. Precision Reflex’s attention to detail and proven craftsmanship make this upper a strong choice for shooters seeking a refined SPR-style build.

Key Features:

• Manufacturer: Precision Reflex
• Model: MK12 Mod 0 SPR Gen III Upper
• Caliber: 5.56/.223
• Barrel Length: 18" Douglas 416 Stainless Steel
• Twist Rate: 1-7
• Receiver: Forged 7075-T6 Flat-Top
• Handguard: Gen III Rifle-Length Carbon Fiber Free Float Forearm
• Gas System: Rifle Length
• Muzzle Device: AE Brake And Collar, 1/2x28 Threaded
• Sights: PRI Flip-Up Front Gas Block Sight And Rear Sight
• Color: Flat Dark Earth
• Overall Length: 27"
• Weight: 5.2 lbs