yes, it is easy to convert your hungarian akm to accept 30/40 round magazines and drums.

first, you need to add 5 usa parts to the rifle. i would suggest the 3 fire control parts and 3 furniture parts (hammer, trigger, fdisconnector, buttstock, pistol grip and handguards) as being the easiest and quickest way to get legalfor the conversion.

figure $30-40 for the trigger parts (on the cheap. better ones cost more) and maybe $80 for a furniture set...maybe a tad more or less depending on where you shop and what makes you happy.

then, it's simply a matter of using a set of files and perhaps a dremel tool for rough stock romoval to open up the magazine well to accept the wider double-column magazine.

go slowly and remove stock evenly from both sides. i find that scribing layout lines around a cut up old magazine top simplifies things, but it isn't a necessary step.

file the magazine catch lever to suit...if required at all.

Quoted: don't single stack guns have any US parts in them (wasr2)?

not the wasr