First post but hope to add my input in as many ways as possible. So I picked up a ak receiver, and when I bid on it, key word bid, I did not realize it was an ak74 receiver. But I made the mistake of ordering a pinned barrel and trunion for 7.62x39. So I have parts I know I can't use. So here are the questions. I have seen a vz 58 in 5.45x39 Can a person use a vz58 in the same caliber on a ak74 lower? If not what is the next parts kit country I can use? I can buy it already made but I have 7 ar15s. Being I have built 5.56, 7.62x39, 300 black, 50 beowulf, 2 are pistols in .223 And 3 Glocks. 9,40,22tcm So I have been around the builders area So back to questions. Ignore the fact of ammo cost because the beowulf ammo is pricey as all heck So even if I Hodge podge it all together which I know is not the best idea to do due to parts fitment issues . What is the next best route even if piecing it together a little bit here and there how can I build this ak74 if parts kits are no longer available. I wanted a folding stock but turns out that trunion is a horse of a different color and requires my lower to be drilled out larger. Not looking to add more holes to something that I already know very little about. So I come to the nearest voice of reason. So if anyone has been down this road hole and has an answer or knows a way to go about it. Please put in your your two cents .