How to Modify a Stamped MAK 90 Receiver to Attach a Collapsible Magpul M-4 Stock

In this video I show how I modified the back end of my MAK 90 stamped receiver so that it would fit the CHINESE MAK-90 SLANT CUT STAMPED RECEIVER M4 STYLE ADPTR #PK1011I bought from Desert Fox Outfitter.
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