Purchased an Auto Bolt Release from Rimfire last week, along with my hammer bushing for the MKIII. Got that in one of the rifles and it works great. So decided, as I now had a template, to mod the other rifle as well. A small set of files later (which cost more than the part!) and voila! Job done. I'm going to mod the spare I have and drop that in a buddies rifle so he does not have to buy one. It's an easy fix to do and boy does it make a difference....while the bolt release was not something I hated, I did not realise how much of a pain in the butt it was till I fixed it. I also did a comparison between the standard trigger and the modded one I have (hammer only replacement). I've never run them side by side, but the difference is huge! Anyone got any fun simple tweaks to their 10/22 to share?