Gen 4 19 with only around 1k rounds through it. Does it look like excessive wear on the locking block? No aftermarket parts or anything, it's all stock. As i said its a Gen 4 19, serial number RXVXXX.It almost looks to me like its worn down to copper. Thing its something to be concerned about? The gun is still perfectly operational, I just want to get some advice. Thanks all Wanna kill these ads? We can help!