Asia a"soft metal receivers

Hi all. New to gel blasters. Just wondering if anyone can shed light on the metal receivers from Asia ■■■■■■■. Question is. Is only the metal gel blaster reciever compatible with Australian gel blasters or does a lot of the metal ■■■■■■■ reciever compatible. Will be fitting a wells V2 box from m4a1. Will buffer tube be compatible with gen 9? Is the thread same for handgurds. Will charging handle still work without blowback? I’m kinda confused with it all. I want to build a very solid blaster with the Wells cast box. Cheers guys

topic had been covered multiple times.