This is my first post and I will start by saying I am old, stupid and slow. I have recently purchased a Rohrbaugh R-9 and took it out for the second or third time to fire it. I grabbed what I thought was the second magazine but it was the Wrong Magazine. It was a magazine for a Kahr PM-9. Amazingly it worked fine although it did cause the slide to remain open after the final round. By the way the little pistol has been 100% reliable and accurate for it's size.