Couple of questions here. New to DM's
Just got a DM9 in a trade and it looks pretty worked so I thought I would give it a full tear down. Upon taking apart the LPR and looking at the manual online I noticed some differences. The manual shows 9 small shims and 2 big shims. But it does not show a small plastic ring on the LPR piston. I have 8 small shims and 2 big shims so I thought **** this gun is missing a shim but then I noticed the little ring on the piston. I doesnt show the ring in the manual illustration? Is this a change made? I heard of a possible misprint in the manual at one point but couldnt find any info on it. Can anyone shed some light?
Also what are the two small allen screws in the back of the gun on each side. In between the bolt and lpr?