PRI AR-15 Mark 12 Mod H Upper Receiver Assembly 5.56x45mm 16″ Barrel

Original price was: $1,599.99.Current price is: $1,199.99.


PRI AR-15 Mark 12 Mod H Upper Receiver Assembly For Sale

The PRI AR-15 Mark 12 Mod H Upper Receiver Assembly is an MOA-accurate, ready-to-fire 5.56 upper. A 16″ Douglas 416 stainless steel cask with a fitted bolt and a common bolt carrier are included with the PRI mk12. The PRI uppers feature a flat-top Picatinny receiver, Pistol G2O,  flip-up front and rear sights placed on a PRI rail, and a rifle-length gas tube. It includes an AE Muzzle Brake with a collar and a Gas Buster charging handle with a sizeable military lock. A forearm rail and a Reece top rail that attaches to the forearm rail are included with the PRI mk12 upper.

What is MK12 mod 0 upper?

The mk12 mod 0 upper has a 16.5″ barrel top with MOA capabilities. Available in Black and Flat Dark Earth. Note: Top assemblies have a flat $10 shipping fee per assembly to the continental United States and a cost of $50 shipping to Alaska and Hawaii.

What replaced the PRI upper receiver?

The PRI upper receiver has since been superseded by the Mk16, Mk17, and M110 rifles, but some of the SEAL teams still use the SPR, and it still maintains an almost cult following among special operations groups.


  • Douglas 416 stainless steel 16″ Cask with M4 feed ramps.
  • Rifle Size Forearm with Black or FDE Finish.
  • MK12 Upper T6 7075 Hard coat anodized aluminum.
  • Overall Length of 25″.
  • Only 5.7 Pounds.
  • Reece Picatinny Top Rail with Flip Up Front and Hind Sights.
  • 1/2″x28 Cable with AE Muzzle Brake and Collar.


Made In the United States of America


Product Information

Cartridge 5.56x45mm NATO
Finish Black
Material Aluminum
Weight 5.7 Pound
Barrel Length 16 Inches
Twist 1:7 Inches
Threads 1/2″-28
Barrel Contour Standard
Sights Yes
Barrel Finish Black
Chrome Lined No
Gas Block Diameter 0.75 Inches
Gas System Length Rifle
M4 Feed Ramps Yes
Upper Receiver Type A4 Flat-Top
Barrel Material 416 Stainless Steel
Handguard Recce Top Rail
Bolt Carrier Assembly Included Yes
Muzzle Device AE Muzzle Brake
Mil-Spec or Commercial Commercial
Country of Origin United States of America
Compatible With

Delivery Information

Shipping Weight 6.525 Pounds


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