In this technical guide by YNS Tactical, they show how to disassemble the APFG MCX Hopup and Barrel... "This takedown and reassemble demo goes over some of the nuances with the APFG MCX line's front end, which includes the Hop Up chamber, mock gas block and adjustment dial, outer barrel, and muzzle device.

We demo a few solutions to help people prevent causing damage to this when taking them apart because it is something we see far too often.

We desperately want and plan to do some content soon on other things besides the APFG MCX."