Nimrod: Good idea on both. I did the auto release some time ago and if I can do it, anyone can. 4 left paws ya know. Was going to try to do the hole in the bolt and then decided not to, again because of 4 left paws. Also because I take out the bolt when cleaning the weapon each time anyhow. Along with cleaning your barrel remember to use the weed whacker line and do not use the alum. or steel rods. 