Hello everyone I have a new romak 991 and can't find a hole lot on modification info I now I need to make it take double stacks. But I need help on the but stock they say some are cut so I can't put the normal stock and grip on so how do I now it's cut and the muzzle nut I think they call it is welded on and may not have threads under it how would I know if it does have threads and can I grind off the weld. This is the first ak or whatever it is iv been able to look at and check out so it all looks normal to me lol I only payed 250 for it so i don't care if I have to chop into it. Any info will be a great help thanks

P. S why I want to change the stock is because it sucks if you have ever held one you would now lol