The Precision Reflex MK12 Mod-H .223/5.56 16" Barrel Complete Upper Receiver in Black is built as a faithful recreation of the classic Mk12-style SPR upper for AR-15 platforms. Featuring a Douglas 416 stainless steel 16.5" barrel chambered in 5.56 NATO, a PRI Gen 3 carbon fiber round handguard with full-length Picatinny top rail, and flip-up front and rear sights, this upper is configured for precision shooting while maintaining a clean, purpose-driven profile. The included Allen Engineering brake and collar are ready for compatible suppressors, and the PRI M84 Gas Buster charging handle helps manage gas blowback for a more comfortable shooting experience.

This complete upper receiver group arrives ready to pin onto your AR-15 lower, making it an excellent choice for dedicated range rifles, precision training builds, or enthusiasts who appreciate historically inspired SPR configurations. With sub-MOA accuracy potential from the Douglas barrel and a balanced 25" overall length at roughly 5.75 pounds, it offers a refined shooting feel without unnecessary bulk. Precision Reflex is known for meticulous machining, quality materials, and thoughtful design, giving this Mk12 Mod-H upper a reputation for reliability and craftsmanship.

Key Features:

• Manufacturer: Precision Reflex
• Model: MK12 Mod-H Complete Upper Receiver
• Caliber: 5.56/.223
• Barrel Length: 16.5" Douglas 416 Stainless, 1:7 Twist
• Forearm: PRI Gen 3 Rifle Length Round Tube With Picatinny Top Rail
• Gas Block: PRI Gas Block
• Muzzle Device: Allen Engineering / Ops Inc Brake And Collar
• Top Rail: Swan Rail Mini-Sleeve
• Charging Handle: PRI M84 Gas Buster
• Length: 25" Overall
• Weight: Approximately 5.75 Pounds
• Accuracy: Sub-MOA Potential With Quality 5.56 Ammunition