So I'm looking through eBay and find a DVD that claims to show you how with "just a hardware store tool" you can convert your HK mp5 .22 to auto fire. And claims to be able to convert it back. Now this is just a DVD, but I have to be honest, I have an HK mp5 .22, and I am definitely curious..... Just want to know your guys thoughts ....??? And I understand all the legal beagle stuff, so please no need for a lecture just wondering what some of you think and have you ever heard of this before.