Gentlemen, I am having difficulty in the disassembly of my Sig 239 and am seeking suggestions for a remedy. This is a relatively new stock gun, been shot approx. 300 rounds or so. When I attempt to disassemble the slide from the frame, the takedown lever does not move without great resistance. If I force the lever down, I can usually get the slide off the frame but the lever requires an unusual amount of force to turn it down. When I look at the disassembeled slide, I can see that the recoil spring guide (which is apparently made of some type of plastic) is not flat of the flanged end. It is not grossly misshapened but appears to be flattened on one side, perhaps from recoil pounding. I have ordered a new recoil spring guide but it the mean time I am wondering if anyone else has had this problem???? Stubby