It ain’t done yet but its working great, so I couldn’t wait to unveil. Most of the parts are from an AMD 65 AK47. The bolt and carrier are from an AK74. The barrel and mags are from a PPSH 41. The magwell is from Lichtenberg. The flash hider is from an L1A1.
Here are the details.
Barrel It is a PPSH 41 barrel. The rear of the barrel was turned down and sleeved (and a tack weld) to fit the AMD 65 front trunnion. Another sleeve was installed for the rear sight block. The barrel was turned to fit the gas block and front sight block of the AMD 65. A sleeve was added to the barrel in front of the gas block to fit the front hand guard retainer. The barrel was threaded for LH 14x1 threads. A cut was taken from the chamber end of the barrel for extractor clearance. Minor radiusing of the lower half of the chamber lip was done after a round caught on it during testing. The gas vent hole started at 0.125” and grew to 0.170” during testing.
Flash Hider I drilled out an L1A1 flash hider and pressed in a steel bushing. The bushing was then drilled out to 13 mm and tapped for LH 14x1 threads.
Receiver I traced an AK Builder flat (love your flats man!) onto 0.040” thick 4130 steel and cut out everything but the magwell. I did some measurements and hacked out my estimate of the opening. I bent the receiver on my own jig. The magwell opening was cut too big as was as the back clearance notch for the bolt carrier. A new receiver is planned before final finishing.