So most mag springs I’ve used over the years are inline/straight up the tube.

Recent HK VP/P30 mags the spring “twists” about half way down. This isn’t a single QC type issue it is designed that way.

For you materials engineer folks, why would you twist/rotate the spring vs keeping it inline.

Thanks
Chris

I cannot find anything on this. How many do you have like this? A picture would sure be useful.

Its a little hard to show but in the picture below you should be able to see the locking plate is canted a bit as the spring "twists" a bit as it travels from follower to locking plate. vs the one on the right which is straight up and down so to speak.



Its really just a curiosity for me as there are absolutely no functional issues at play.

As to the number of mags, numerous. This is not a packaging or mishap as they are ALL very specifically made in this way and all start their "twist" at a very specific point.

This is just jack of all trades, master of none guy in me trying to gleen another piece of completely and utterly useless information.

It looks to me like the spring is a continuous right hand twist and I cannot see a direction change. The lower loops are probably larger due to the magazine body width. They are small at the top due to body tube taper. What we have here Chris, for lack of a explanation, is called a sproing. Part spring and part boing.. . The spring is at the top pushing up on the rounds while the boing at the bottom makes the rounds jump up to get springed. Sproing.

The H&K Sproings came about to ensure reliable feeding, due to some people putting rounds in the magazines backwards..

quote:

Originally posted by David Lee:
The H&K Sproings came about to ensure reliable feeding, due to some people putting rounds in the magazines backwards..

Frankly that makes perfect sense to me. Question answered. .