PCC Magazines! Glock Vs Colt?

Published on May 21, 2025
Duration: 9:43

This video from InRangeTV compares Glock and Colt style magazines for 9mm AR-15 PCCs. It highlights that while Colt magazines offer a default last-round bolt hold open, Glock magazines generally provide more reliable feeding due to a shorter feed path. The discussion also covers magazine availability, cost, and potential durability issues with polymer Glock magazines, recommending Magpul Glock PMAGs as a solution.

Quick Summary

Glock magazines are generally more reliable for feeding in 9mm AR-15 PCCs due to a shorter feed path to the chamber, reducing feed ramp malfunctions. While Colt magazines offer a default last-round bolt hold open, Glock mags are more widely available and cost-effective. Standard Glock magazines may experience wear on their polymer catch areas, but Magpul Glock PMAGs offer improved durability.

Chapters

  1. 00:00Introduction: PCC Magazine Comparison
  2. 00:37Colt Magazine Design and Issues
  3. 01:47Feed Ramp Malfunctions in Colt Systems
  4. 02:37Colt Magazine Retention Issues
  5. 03:12Glock Magazine PCCs and Reliability
  6. 04:06Glock vs Colt: Last Round Bolt Hold Open
  7. 04:49Why Glock Mag Lowers Exist
  8. 05:51Glock Magazine Durability Concerns
  9. 06:33Magpul Glock PMAGs for PCCs
  10. 07:07Overall Comparison and Recommendation
  11. 07:27Cost Differential: Glock vs Colt Mags
  12. 08:09Summary: Glock Mags Make Most Sense
  13. 08:33Long-Term Testing and Conclusions
  14. 09:07Support InRangeTV on Patreon

Frequently Asked Questions

What are the main differences between Glock and Colt magazines for 9mm AR-15 PCCs?

Colt magazines typically offer a default last-round bolt hold open. However, Glock magazines are generally considered more reliable for feeding due to a shorter path to the chamber, reducing feed ramp malfunctions. Glock mags are also more widely available and cost-effective.

Why are feed ramp malfunctions common in 9mm AR-15 PCCs using Colt-style magazines?

The long distance from the magazine feed lips to the chamber in Colt-style systems, combined with the blunt projectile of 9mm ammunition, creates an inefficient feedway path. This increases the likelihood of the round failing to enter the chamber correctly.

Are there any downsides to using Glock magazines in 9mm PCCs?

Yes, the polymer magazine catch areas on standard Glock magazines can wear out faster in PCCs due to increased force. Additionally, they don't inherently provide a last-round bolt hold open without specific upper receiver modifications. Magpul Glock PMAGs are recommended to address durability concerns.

Which type of magazine is generally more reliable for 9mm AR-15 PCCs?

In practice, Glock magazines tend to be more reliable for feeding in 9mm AR-15 PCCs. This is primarily due to their design facilitating a shorter and more direct feed path to the chamber, which minimizes feed ramp malfunctions compared to Colt-style magazines.

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