While browsing my hard drives, I found another interesting model. I can't remember who uploaded it (probably John Fall). Unfortunately, it's incomplete; small parts like firing pin and springs are missing(the receiver/firing pin section seems closed, but maby some of you can use this model or finish the model. But it's still a very nice model. The zip file contains .igs, .sldasm, .step, and .x_t formats. Cheers