AK47 Barrel Pins Falling Out? How Much Pressure?

Published on February 10, 2019
Duration: 10:50

This video details a test measuring the force required to move AK-pattern rifle barrel pins. Conducted by Occam Defense, the tests establish a range for acceptable pin tightness, suggesting that pins requiring 1,000 to 6,000 pounds of force to move are within a normal spectrum. The presenter emphasizes the importance of proper pin fit for firearm reliability and longevity.

Quick Summary

The acceptable force range for moving AK-pattern barrel pins is generally between 1,000 and 6,000 pounds. This range ensures a secure press fit, crucial for firearm reliability. The force required can vary based on the pin's taper and whether movement is initiated or sustained.

Chapters

  1. 00:00Introduction: Barrel Pin Force Test
  2. 00:47Occam Defense: Setting Up the Test
  3. 01:19Testing the Wasser 10 Barrel Pin (First Direction)
  4. 02:12Testing the Wasser 10 Barrel Pin (Second Direction)
  5. 03:18Comparing to an AK-63D (Re-barreled)
  6. 04:19Testing Another AK-63D Barrel Pin
  7. 05:03Testing a Factory RAZ 47 Barrel Pin
  8. 05:59Conclusion: AK Barrel Pin Quality Spectrum

Frequently Asked Questions

What is the ideal force range for AK-pattern rifle barrel pins?

Experts suggest that the acceptable force range for moving AK-pattern barrel pins is typically between 1,000 and 6,000 pounds. This range ensures a secure fit without being excessively tight, contributing to the firearm's reliability and longevity.

Why do AK barrel pins have a taper?

AK barrel pins are designed with a taper to create a tight press fit within the barrel and receiver. This conical shape ensures that as the pin is driven in, it expands to fill the hole, providing a secure and stable connection for the barrel.

What's the difference between breakaway and sustained force for barrel pins?

When testing barrel pin retention, two forces are measured: the 'breakaway force' is the initial amount of pressure needed to start moving the pin, while the 'sustained force' is the pressure required to keep the pin moving once it has been loosened.

Is a very tight AK barrel pin always better?

While a tight barrel pin is generally preferred for reliability, excessively tight pins (beyond the 6,000-pound range) can be problematic. The ideal is a secure fit that requires significant force to move, but not so much that it risks damaging components or making future maintenance difficult.

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