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AR15.COM
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2/14/2006 7:44:08 PM EDT
If you have a real HK Mp5 kit built on a SW receiver...Do builders modify the receiver to fit the push pin lower or vice versa???
2/15/2006 4:52:02 AM EDT
[#1]
If the rifle is being built as a semi, then the trigger housing and grip housing is modified to fit the semi receiver shelf, and function as semi only.

On the other hand, if the weapon is being built as a Post ban MG (read form 5 transfer), then the receiver shelf is removed, the pivot pin holes are drilled, and the MG is set up as a swing lower.
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