I have had a BM M2 Stryker for about 6 months now and while it is very well made and one of my favourites, the liner lock has worn/moved all the way over and is very easy to disengage. Hence, I failed to carry it due to a lack of confidence in the lock-up. I did not want to send the knife half way around the world and so decided to see if I could fix it myself. BM uses a 3/16th stop pin and by cutting down the base of a 5mm drill bit which is about .2mm thicker than the BM pin you end up with a slightly larger diameter stop pin which causes the liner lock to engage earlier. You will need to gently file the ends of the new pin down untill it fits snugly in the liners. Simply drill and tap the new pin and screw it in. The lock-up on the Stryker is now rock solid and engages the tang the width of the liner and is very difficult to disengage. Now I can feel comfortable carrying it again.