It may be that the actions are acceptable as received. Don't be in a hurry to fix something that isn't broken.
If the actions seem sticky, try a drop of PTFE/oil on the pivot point and tang area. Remember that the liner lock actually bears on the tang, and this area is easily accessible when the knife is folded.
The next step is hosing the knife out with some sort of solvent. Some have advocated brake fluid, others WD-40; I use 1,1,1,trichloroethane (Gun Scrubber). Then reapply the lubricant.
If this doesn't work, then you either send it back to BM and have them fix it, or bite the bullet and take the darn thing apart, degrease all the parts, and use some 400 or 600 grit to smooth the tang area and the end of the liner lock. If you have the knife apart, I recommend you use a PTFE/ or Li/grease product, or MoS2 grease. It tends to stay in place better. Sometimes nothing will fix the darn thing, as the problem is in the geometry of the tang/liner lock engagement. Some series of BM's are atrocious for lock variability. The now discontinued BM 970 and 975 series were notorious for crummy locks. I took several of these apart with sometimes only minimal improvement of the lock action.
Of course, you can still send the knife back to BM after you have disassembled and reassembled it, usually they won't hassle you unless you screwed something up. However, to avoid potentially embarassing questions, you should probably take note of the factory lubricant; they used to use a white Li grease. Reapplying something resembling the factory lube may prove a wise tactic. I suggest, of course, should BM ask you if you took it apart that you provide a honest and forthright answer.
Hope this helps, Walt
