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Posted: 10/14/2011 6:04:54 AM EDT
| I have a few rifles with gritty triggers. I would like to smooth them without changing angles or replacing with after market parts. I just want them to be smoother and not do anything to alter the design. Anyone have experience doing this? Thank you in advance. Tom. |
| I had the same problem with my last build. I know that the mil-spec triggers are only surface hardened, meaning that the hardening does not go deep. So you have to be careful not to remove very much material. I used crocus cloth on a flat surface to polish the sear engagement surface on the trigger. Check the feel often so as not to take off more than necessary. The trigger now has none of the grittyness it had before. I replaced the springs with a JP 4 lb kit. Remember if you take off too much material and your rifle double taps or worse you have an ilegal weapon on your hands. |
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90% of the grit feeling is going to come from the trigger pin surface to trigger/hammer pin channel surface.
You can use a Q-tip on a drill with lapping compound to polish the hammer/trigger inner channels, and regarding the pins, tape off the edges,and only light drill spin polish the centers were the hammer and trigger ride on them with 800 wet/dry sand paper. Or if you are looking for no slop between the pin to channels that you will end up with above (if you are going for a mach type trigger job with no slop between the pins and parts) just ream the hammer/trigger/disco channels to .15555, then use the KNS .15550 pins instead. As for the trigger and hammer sears, light polishing work can be done to a point, but if the sears have a lot of chatter that needs to be removed, then you need stoning jigs to hold the angles, and even re-heat treating the sears when done as well. Start with just polishing the pins and channels, to feel the improvement alone to feel a big difference, then you can decide if you want to attempt any sear polishing.. |
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