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Discussion Starter #1
I'm replacing/upgrading the rear sight on my MP5SD 22LR, and I wanted to know if there would be any significant difference between using a HK91 G3 or HK93 drum. I'm guessing that neither is really going to account well for the ballistics of a 22LR, so does it make a difference which one I use?

TIA for the replies.
 
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