Weeeeeeeeeeeeeell... yeah... ish.
TM and clone AK's aren't as bad as this lot are making them out to be. The CYMA internals make a gun which shoots better than the guns they were cloned from and as well or better than a lot of expensive higher spec guns - G&G Top Tech for eg OOTB do not beat the range and accuracy of an OOTB CM.028-x. Yes there are screws and yes pot metal: the .028 range have plastic receivers too - but they are surprisingly solid.
As just 1 example I once jumped off a loading dock and went straight over onto my front in a load of rubble and debris - landed on my elbow pads with my CM.028U clasped diagonally across my chest, stock extended, and rolled to absorb the momentum - thus putting a lot of strain on
Sabine's stock and plastic receiver. 14 1/2 stone of me -
Sabine totally fine.
Considering what you said about budget and what this gun will be for you, if I was doing the same I would buy
this &
this and combine the two - dead simple to do and leaving you with another very saleable tactical AK which you could sell, maybe for as much as £110-20 to recoup some of the £166.51 spent. While yours is in bits, just for the 'may as well since you're at it'-s, you could rewire with Maplin 16AWG wire, solder your motor connectors while you fit the Deans connectors and Gate PicoAB MOSFET, which should allow you to use an 11.1V stick LiPo, or better a 9.9V LiFe if you can find one which will fit under the dust cover (I haven't yet but then again I haven't put that much effort into it)
- Gearbox-wise all it really needs is a spring downgrade to an Element M105 (from Dualdealshop on fleabay for cheapest price), degreasing with alcohol or soap and water and regreasing with CT-2 silicone grease with teflon {(fleabay search it) slap loads of it all over the gears, the insides of the shell, the tappet plate, spring guide, spring, and all round the O-ring of the piston head and inside the cylinder to improve airseal and increase life of O-ring}, and shim with SHS shims (using the copper ones on the inside against each side of the gear and more teflon grease between the outside shim and bushing (which also keeps the shims on the axles as well as smoothing their spin). The rest of the box is designed to fire at approx 800 rpm with a spring power of somewhere between 120 and 130 = it will be fine with high voltage and lower spring power.