9mm magwell blocks

Oh, and if you choose to use Glock mags on a 9mm such as above, you'll have to send the bolt off to be modified. The Glock mags feed lips are narrower than an UZI or Colt type 9mm mag, and the bolt has to be shaved to fit between them.
 
I am using the Hahn Precision magwell block on my 9mm AR. Never had any problems. I installed it the day I got it, and it has worked perfectly ever since. It may cost a little more, but I guess you get what you pay for....
 
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