Can the KAK K15 4.75" AR Pistol Handle the Pressure?

Published on July 11, 2024
Duration: 20:27

This review of the K Industry K15 AR pistol with a 4.75-inch barrel highlights its extreme concealability but notes significant trade-offs in dwell time and velocity. The firearm experienced multiple malfunctions, primarily failure to extract, attributed to a faulty extractor. After replacing the bolt carrier group, performance improved dramatically. The review also covers accuracy testing at various distances and compares it to a Fold AR pistol.

Quick Summary

The K Industry K15 AR pistol's 4.75-inch barrel offers exceptional concealability but leads to reduced dwell time and significantly lower projectile velocity (averaging ~1778 FPS) compared to standard AR-15s. Initial reliability issues, including failure to extract, were resolved by replacing the bolt carrier group.

Chapters

  1. 00:00Introduction to K Industry K15 AR Pistol
  2. 00:25Overview and Concealability
  3. 01:09Controls and Ergonomics
  4. 02:24Initial Malfunctions and Jams
  5. 02:53Diagnosing Feed Ramp and Bullet Scarring
  6. 03:49Double Feed and Mortaring Issues
  7. 04:37Failure to Extract and Extractor Issues
  8. 05:35Bolt Carrier Group Swap for Testing
  9. 06:30Extractor Analysis and Brass Buildup
  10. 06:46Testing with Fold AR Bolt Carrier Group
  11. 07:57Improved Performance After BCG Swap
  12. 08:08AR Platform as a Fight Stopper
  13. 08:19Dwell Time Explained
  14. 08:53Velocity vs. Concealability Trade-off
  15. 09:02Chronograph Testing Setup (Garmin O C1)
  16. 09:55K15 Velocity Readings
  17. 10:17Loudness of Short Barrels
  18. 10:28Comparison with Fold AR
  19. 11:04Fold AR 16-inch Barrel Velocity Readings
  20. 11:44Ammunition Used (AAC)
  21. 11:57Concealability Comparison: K15 vs. Fold AR
  22. 12:44Purpose of a Short Barreled Pistol at 100 Yards
  23. 13:00Keyholing Concerns
  24. 13:33Checking Target for Keyholing
  25. 13:51Accuracy Results at 100 Yards (No Keyholing)
  26. 14:19Compromise Testing at 25 Yards
  27. 14:53Accuracy Results at 25 Yards (Bench Rest)
  28. 15:13Speer Gold Dot Performance
  29. 15:24Unsupported Firing at 7 Yards
  30. 16:01Trigger Analysis
  31. 16:40Trigger Pull Weight Measurement
  32. 17:09Final Thoughts on K Industry K15
  33. 17:34Dwell Time and Velocity Trade-offs
  34. 18:01Accessory Mounting Limitations
  35. 18:23Recoil Control and Points of Contact
  36. 18:50Sighting and Manual of Arms
  37. 19:09Price Comparison: K15 vs. Fold AR
  38. 19:23Accuracy Recap
  39. 19:45Is This a Practical Firearm?

Frequently Asked Questions

What are the main advantages and disadvantages of the K Industry K15 AR pistol?

The K Industry K15 AR pistol's primary advantage is its extreme concealability due to its 4.75-inch barrel. However, this comes at the cost of significantly reduced dwell time, lower projectile velocity, and potential reliability issues, as demonstrated by the extractor failures experienced in testing.

What caused the malfunctions experienced with the K Industry K15 pistol?

The K Industry K15 pistol experienced multiple malfunctions, including failures to extract and double feeds. These issues were diagnosed as stemming from a faulty extractor on the original bolt carrier group. Replacing the BCG with one from a Fold AR resolved these problems.

How does the K Industry K15's velocity compare to a standard AR-15 barrel?

The K Industry K15, with its 4.75-inch barrel, averaged around 1778 FPS with AAC 55-grain ammunition. This is significantly lower than a 16-inch barrel, which achieved nearly 3000 FPS with the same ammunition, highlighting the velocity loss due to reduced dwell time.

Can the K Industry K15 AR pistol be accurate at longer distances?

Despite its short barrel, the K Industry K15 demonstrated surprising accuracy at 100 yards, with no keyholing observed. Groups were around 5-6 inches using a red dot sight. At 25 yards with a bench rest, groups were just over an inch.

Related News

All News →

More Reviews Videos You Might Like

More from Pew Pew Tactical

View all →