HK VP70 - Turning 9x19 into 9x17 since 1970

Published on February 15, 2021
Duration: 14:48

The HK VP70, released in 1970, was the first polymer-framed handgun and pioneered the Volkspistole concept. Its direct blowback action, combined with deep rifling to manage 9x19mm pressures, significantly reduces muzzle velocity, effectively turning 9x19mm into 9x17mm performance. While historically significant, it features a heavy DAO trigger and lower ballistic performance compared to modern firearms.

Quick Summary

The HK VP70, released in 1970, was the first polymer-framed handgun. Its direct blowback action and deep rifling intentionally reduce 9x19mm muzzle velocity, making its performance comparable to 9x17mm (.380 ACP), despite its historical significance.

Chapters

  1. 00:00Introduction to the HK VP70
  2. 00:45Volkspistole Concept and Design
  3. 02:04Unique Barrel Rifling Explained
  4. 03:03Field Stripping and VP70Z Features
  5. 07:01Velocity Testing vs. Hudson H9
  6. 10:59Velocity Testing vs. Sig P365 XL
  7. 12:46Summary and Conclusion

Frequently Asked Questions

What makes the HK VP70 historically significant in firearm design?

The HK VP70 is historically significant as it was the very first polymer-framed handgun ever produced, released in 1970. This innovation predated the widespread adoption of polymer frames by other manufacturers, setting a new standard for handgun construction.

How does the HK VP70's direct blowback action affect its performance?

The VP70 uses a direct blowback action, which relies on a heavy slide and strong spring instead of a locking mechanism. This system, combined with deep rifling to manage 9x19mm pressure, intentionally bleeds off gas, significantly reducing muzzle velocity.

Why does the HK VP70 have lower muzzle velocity despite being chambered in 9x19mm?

The deep rifling grooves cut into the VP70's barrel allow gas to escape past the projectile. This design choice reduces chamber pressure for the blowback system but also significantly lowers the bullet's muzzle velocity, effectively making its performance comparable to 9x17mm (.380 ACP).

What are the key features of the civilian HK VP70Z model?

The civilian VP70Z model is notable for its 18-round double-stack magazine and a cross-bolt safety. It features a fixed barrel and a striker-fired mechanism with a double-action-only trigger, which is characterized by its heavy pull.

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