Precision Reflex - Product Detail - 18" Mark 12 Mod 0 SPR Black Upper in 5.56 Cal. 1-7 Twist - $1,556.00

18" Mark 12 Mod 0 SPR Black Upper in 5.56 Cal. 1-7 Twist

This Mark 12 Mod 0 5.56 caliber 18" Black upper is a complete upper with all the extras and ready to shoot. Upper is a M.O.A accuracy 1-7 Twist barrel
Item: 07-55618-SPR-RDB7  Back Ordered
  Manufacturer: PRI
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18" Mark 12 Mod 0 SPR Upper in Black Finish 5.56 Cal.
This Mark 12 Mod 0, ready to shoot 5.56 upper is equipped with a 18" Douglas 416 stainless steel barrel 1-7 twist with a fitted bolt and commercial carrier, flat-top receiver, PRi flip up front gas block front sight and rear sight, rifle length gas tube, a Gas Buster charging handle with big latch, and a OPS inc brake and collar. The system also comes with a Gen III Rifle length carbon fiber free float forearm in Black finish and a full length top rail with PEQII removable rail section. This upper comes with a black barrel.  Please allow 5~10 days for assembly and testing prior to shipping.

Available with Dark Earth forearms and receiver upon request.

PRI MARK 12 MOD 0 SPR
  1. Caliber ......................................5.56/.223
  2. Upper Receiver ........................Forged T6 7075 Hard coat anodized aluminum
  3. Barrel.......18".........5.56 Douglas 416 stainless steel with M4 feed ramps 1-7 twist
  4. Gas Block...................Flip up front sight gas block with 2 cross bolts for securing
  5. Forearm.............................Rifle length with black finish
  6. Rails............................all rails plus SPR PEQ II full length top rail
  7. BUIS.................Rear sight provided that works with gas block sight
  8. Muzzle Brake.............................1/2 x 28 threaded OPS Brake and Collar  
  9. Overall Length....................................................27 Inches
  10. Overall Weight...................................................5.2 pounds

                    THE MSTN BRAKE CAN BE INSTALLED UPON REQUEST AT A DISCOUNTED PRICE (-$85.00)

         Accuracy is based on barrel type    5.56 Douglas  sub MOA, 6.8 Douglas MOA

        Standard on all PRi rifles and uppers are the Gas Buster Charging Handle with Military latch.


  • Manufacturer: PRI
  • Required Shipping Method: UPS Ground Flat Rate Upper Shipping $10.00
  • Shipping Weight: 9 lbs
  • Dimensions: 20" x 0" x 0"
Average Rating   5 stars (based on 3 reviews)
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Recent Reviews Rating: Reviewed By: Wesley C. Review Date: 6/8/2017 Comments: I bought one of these uppers a few years ago and it has been absolutely fantastic. The accuracy is sub moa, all day long. The Ops Inc. break and collar were installed with exact measurement, I get exactly 8 revolutions with the AEM5. I couldn't be happ...
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Rating: Reviewed By: Anthony J. Review Date: 1/25/2017 Comments: Had the opportunity to put some rounds down range today with this new Mark 12 upper. The ammo was a hand load consisting of a 77 grain SMK with a charge of RL-15 topped with a Fed 205M primer. A trusted and accurate load. My final 5 shot group, after a so...
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Rating: Reviewed By: joe t. Review Date: 12/30/2014 Comments: starting with customer service, Tony was awesome in not only doing all he could to help me in a friendly manner but he also made sure i received my upper in time to prep for a yearly competition. upon receiving the upper all i could think was "how come ev...
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