I've had my 9mm shield for a couple of months and I like everything about it. The field stripping has been easy and the pistol has been accurate and not a single issue at the range. This morning I set up to clean some of my pistols, the shield absolutely cannot disassemble this time around, no matter what I do, never had a problem before. The slide stops when it is protruding from the front about 1/4" and can't be pulled out any further. Any thoughts or remedies?