Testing Glock Barrels: Zero Shift and Accuracy

Published on November 28, 2017
Duration: 7:35

This video tests the zero shift and accuracy impact of swapping Glock barrels (early Gen 2, late Gen 2, Gen 3, Gen 4, and Faxon match-grade) in a KA Arms Charlie slide equipped with a DeltaPoint Pro red dot. Using a Ransom Rest at 15 yards, the test reveals that while group size remained relatively consistent, barrel swaps did cause a shift in point of impact. Later generation Glock barrels (Gen 3 and Gen 4) and the Faxon match-grade barrel demonstrated improved accuracy and zero consistency compared to earlier generations.

Quick Summary

Swapping Glock barrels between generations can cause a noticeable shift in the point of impact, affecting the firearm's zero. While group sizes remained consistent, later generation Glock barrels (Gen 3 and Gen 4) and aftermarket match-grade barrels like Faxon demonstrated improved accuracy and zero stability.

Chapters

  1. 00:03Introduction: Testing Glock Barrels
  2. 00:14Barrels Tested: Gen 2, Gen 3, Gen 4, Faxon
  3. 00:36Ransom Rest Setup for Scientific Testing
  4. 00:48Testing Procedure: 5-Round Groups
  5. 01:30Early Gen 2 Barrel Results
  6. 02:01Late Gen 2 Barrel Swap and Test
  7. 02:50Late Gen 2 Barrel Group Analysis
  8. 03:11Gen 3 Barrel Swap and Test
  9. 03:32Gen 3 Barrel Group Analysis
  10. 03:40Gen 4 Barrel Swap and Test
  11. 04:13Gen 4 Barrel Group Analysis
  12. 04:43Gen 3 vs. Gen 4 Zero Shift Comparison
  13. 05:11Faxon Match-Grade Barrel Test
  14. 06:03Faxon Barrel Group Analysis
  15. 06:07Overall Results and Conclusions
  16. 06:22Glock Manufacturing Capabilities
  17. 06:34Accuracy at 15 Yards
  18. 06:57Support InRangeTV on Patreon

Frequently Asked Questions

Does changing the barrel on a Glock affect its zero?

Yes, changing Glock barrels between generations can cause a shift in the point of impact, meaning the zero will change. This test showed that while group sizes were similar, the point of aim shifted with different barrels.

Which Glock barrel generations are most accurate?

The test indicated that Glock Gen 3 and Gen 4 barrels provided tighter groups and a more consistent point of impact compared to earlier Gen 2 barrels. The Faxon match-grade barrel also performed very well.

Is it safe to swap Glock barrels between generations?

Yes, Glock barrels from different generations are generally interchangeable and can be swapped into the firearm without concern for basic function. The primary impact observed was on accuracy and zero.

What equipment was used to test Glock barrel accuracy?

The test utilized a KA Arms Glock 19 Charlie slide with a DeltaPoint Pro red dot sight, and a Ransom Rest to ensure consistent firearm placement and eliminate shooter error during accuracy testing.

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