I have always found it interesting that a rifle need be issued with extra parts and manual. Did the Garand and SVT40 need them? Do they need a shooters kit to shoot today? The G43 would be last of the three I would want in combat IMO.
They are an interesting piece of history but not what I would want in combat. Having fired 20 M1 Garands and at least 10 SVTs, nothing ever failed/broke or did not cycle. The snipers I have fired are on par with the average SVT sniper I have fired accuracy wise but not on par with a Garand. In fairness, I have fired at least 5 G/K43s unaltered without a shooters kit in the 80s and 90s. I would not try it now.
The Germans were behind on semi-autos and not doing it well IMO. The gas system is not unlike the SVT but they forgot the gas adjustment. The Garand was too strong to worry about. To pay what these sale for now, and to shoot them, is not a good idea. Not the same rule with the SVT and M1 Garand. It amazes me the Germans could not come up with a better semi-auto, although the FG 42 select fire may be the best of the bunch in combat, but that is the way it was.