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Premium Member
4,398 Posts
Discussion Starter · #1 ·
Here is where to pin your HK91 mags to make them 10 rounders.

Just use a 4mm punch through the aluminum and install the rivet to size.

bam. 10/20 magazine and its clearly been modified to a legal capacity. Easily shown to LE.

maybe we can have a "how to" magazine resource for modifying our high caps to be legal 10s?

this is an easy one anyone can do at home in literally 30 seconds.

Hammer, punch, hand riveter.

beats the hell out of buying $75 , 10 round H&K mags

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