http://www.world.guns.ru/smg/smg59-e.htm
Yes you push a button to charge it
unfortunatly that button is right on top and at the buisness end of the gunbarrel,
And thats not the realy dumb thing about it!
this is
To disassemble the PP-90M1, one must screw out the long disassembly screw, located above the magazine. This requires no tools, but can take about 20-30 seconds. When screw is gone, you then can took the barrel, bolt and return spring out of the gun by pulling it forward.
why the heck they did not just rip off the Calico is beyond me.
I suspect Russias criteria for selling this gun is
1) Contries that Russia dosent like
2) and are dumb enough to actualy buy the gun