Accuracy in the Mk12? A brand new Mk12 Mod0 upper from PRI.

Published on March 9, 2021
Duration: 8:43

This review re-evaluates the Mk12 Mod0's accuracy with a new PRI upper, finding it a capable Designated Marksman Rifle (DMR) out to 800 yards, especially when suppressed. Testing with IMI 77gr and Mk262 ammunition showed significant accuracy improvements with the AEM5 suppressor, reducing group sizes by up to 33%. The video emphasizes that 9-shot groups are more statistically representative of a system's true capability than smaller groups.

Quick Summary

The Mk12 Mod0, tested with a new PRI upper, proves to be a capable DMR effective to 800 yards, especially suppressed. Suppressors improved accuracy by up to 33% with IMI 77gr Match and 30% with Mk262. The video advocates for 9-shot groups for statistically reliable accuracy assessment.

Chapters

  1. 00:34Mk12 Accuracy Re-test Goal
  2. 01:11Why a New PRI Upper?
  3. 02:34100-Yard Live Fire Testing
  4. 03:03IMI 77gr Match Results (Suppressed)
  5. 04:07Mk262 Performance with Suppressor
  6. 05:259-Shot vs. 5-Shot Groups Explained
  7. 06:14Mk12 as a DMR System Conclusion

Frequently Asked Questions

What was the main goal of the Mk12 Mod0 accuracy test in this video?

The primary goal was to re-evaluate the accuracy of the Mk12 Mod0 using a brand new 2020 factory PRI upper. This aimed to determine if previous accuracy results were potentially affected by barrel wear on older rifles.

How did using a suppressor affect the Mk12's accuracy with different ammunition types?

Suppressors significantly improved accuracy. With IMI 77gr Match ammo, group size decreased by 33%. For military Mk262, the suppressor provided a 30% improvement in consistency, tightening groups.

Why does the video emphasize using 9-shot groups for accuracy testing?

The speakers explain that 9-shot groups are statistically more representative of a firearm system's true capability. Smaller groups like 3 or 5 shots can sometimes be misleading and don't capture the full performance spectrum.

Is the Mk12 Mod0 considered a benchrest rifle or a DMR?

While accurate, the Mk12 Mod0 is presented as a highly capable Designated Marksman Rifle (DMR) system, effective out to 800 yards, rather than a dedicated benchrest target rifle. Its strength lies in its role as a squad-level precision support weapon.

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