I have built a FMP HK 91. HK parts kit and FMP reciever. Looks great functions awesome. My question. I have purchased another parts kit. Great cond. I am thinking of building another one but with a Hesse reciever. Let me speak for just a minute before you critisize me. I am a welding fabricator, with some basic machine trade ability, I believe I have above average welding skills. Have you heard how these recievers will fit? I have heard bad things about companys that have put these together. But most of companys don't care, as long as it goes out the door. So fill me in on any info that could help me in my decision. Thanks!!!