Just picked up a Mk25 to go with my older 226 Navy. Well Low and behold Houston we have a problem. It appears the mag catch is defective. When you insert a mag it will not seat and it pop back out a little. Will do it if you even try seat it forcibly. You also also you can pull a mag even out even when it's seated. Problem also appears to be worse when it's in slide lock. The problem is not consistent either. One time the mag will seat properly the next time it will not. All my mec gars mags work fine in my older 226 Navy . So I know the mk25 is problem. Well looks like Sig warranty will be getting a call in am. Gun is brand new.. Depressing to say the least. I don't remember them going over this issue in the p series armor's class years ago either. I know we discussed magazine catch issues but I can't recall this one.