G&P M4 Drum Magazine HPA Adapter
thingiverse
This is for a G&P M4 magazine to an Angel Custom 1500 Round Drum Magazine. This attaches to the bottom of the upper portion of the Magazine. The inner chamber and rim needs either a heavy coating of silicone adhesive or epoxy in order to create an airtight seal. I also epoxied the HPA adapter valve into the side to clear the M4 trigger guard. There is a hole that goes through bottom and into the air chamber that is able to take a M10 screw that need to be about 30mm to reach the magazine and hold it together. Use some adhesive or teflon on M10 screw to ensure seal while assembling.
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