I checked out the link you provided. Loved the detail in included. However it is not like my receiver. I have included a couple of pictures of mine. The little gun shot and worked reasonably well. I started have some cycle problem with the new cartridge raising up to high and not going into the chamber. I disassembled the lower receiver before taking pictures of it assembled and now having a hard time to get it to function. It can only go together so many ways and so far I haven't got the right one. Totally baffled. The long tail on the cartridge lifter is creating all the problems. It worked before so what is wrong? No clue.