You have to be careful in what threads you read on INGO. They can be hard on the wallet. I dropped into this one just out of boredom and now find myself thinking that I need to add a .40 AR Pistol to the family. Don't know why, but it seems like it would be a cool project. I have a .300BO pistol that I don't shoot much but a .40 would be a nice one to run for fairly little money.