Hello, I am sure this question has been answered before but I could find nothing on it. My dad got an older Steyr from a friend a few years ago. It is a 40 cal. I think an M40 anyway I love the feel of the gun. I have a Glock and the feel of the Steyr just blows it away. I do have smaller hands so it fits me very well. I am about to purchase a new m40-A1 and was wondering what the difference is for the A1 models compared to the older guns. Thanks.