hk question

Im going to say that your going to have feeding problems. But I'm not 100% sure of the answer. I believe the 9mm/40cal uses the same frame.

I know some guns you can use 40cal mags in the 9mm version.
 
I do believe you can! Same follower and base plate. The insert near the bottom is different, as are the feeding lips. You can probably fit a couple extra rounds of 9mm in a .40 mag??
 
You could, but beware of possible legal issues. I doubt it will be reliable. In my experience the only HK mags that reliably feed 9mm are 40 cal USP 40 Compact mags which have a metal body.
 
yeah I heard you can squeeze in 2 extra...but why bother with hassle when its illegal? You really need an extra 2 rounds for anything an extra mag couldnt cure? just a thought...
 
brigado said:
:rolleyes: can we use the usp .40 mags in the usp .9
Click to expand...
Yes you can, & yes you will have feeding problems as the lips are different. Been there - done that.
 
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