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120 Posts
Discussion Starter · #1 ·
Any one know what the allen screw size is for the +2 mag extension HKParts.net sells? It wasn't included in the package and my smallest one doesn't fit.

Thanks.
 

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102 Posts
I purchased 5 mag extensions like yours and none came with a hex wrench. I called HKParts and spoke to a lady and she put 5 hex wrenches in the mail the next day, with tracking number. It is a tiny hex wrench, me thinks 1.5mm at most.
 
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