I went to the range today. Here's some pics of my H&K 91 while I was tearing it down and cleaning it. What's cool about it is it doesn't use a gas system like most simi-auto rifles. It uses a delayed blowback system. That makes the recoil pretty harsh, but I can handle it The wiki has some decent info on it. http://en.wikipedia.org/wiki/Heckler_&_Koch_G3


removed butt

trigger group and bolt

bolt close up

bolt disassembled