My XM18 is a few months old now and has not opened in my pocket. I do have a slight rubbing on the liner which may be just to blade tension. Big problem is finding a way to adjust it without having to pay the money for a specialized tool. Of anything my only gripe about this knife is the requirement of the tool to make simple, and required, adjustments.
Hey Tomsch, try the procedure below. It worked for me.
Credit to Grimspoon who credited another forum I think.
Originally Posted by Rico801
Okay, I finally took my 3" XM-18 apart and cleaned it up. This knife has always been perfectly centered and the blade was really smooth and opened like lightning.
Usually when I put my XMs together and get the blade centered they are a little tight making it hard to flip open. When I got this one together, the blade was past center towards the lock face and still looser than I like.
I called Rob on the phone and he taught me a little trick that fixed the problem. I felt bad because while I was talking with Rob, my kids were going crazy in the back ground. He didn't seem to mind though.
Here we go:
1. Open blade to 90 degrees and tighten pivot so that it is really tight.
2. Close the blade and loosen frame screws so they arent tight, but still holding the frame together.
3. While the blade is still in the closed position, pull blade towards the side you want the blade to move. In my case, I pulled the blade toward the liner/scale.
4. While pulling blade, tighten the frame screws.
5. Loosen the pivot and adjust it to the desired tension.
These instructions helped to "reset" my blade. Now while in the centered position, my blade has a little more resistance. This is the way I like mine to be.