Hello guys. I’m Chas. I’m new to the forum and I have a problem with my slide not going back after the last round. I cleaned my gun extremely well and I tried it today using 4 magazines. In the last magazine, it did not go back all the way on the last round. I probably put in close to 2000 rounds in 3 months which is how long I’ve had this gun. Do any of you guys have any idea why it won’t go back all the way on the last round? I would appreciate any input on this. Thanks.