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Trigger work.

4K views 20 replies 9 participants last post by  Zippersnapper 
#1 ·
How many have done/had trigger work on your sub-2000 ?
I installed the MCarbo spring kit but after seeing how rough the contact points were I polished them, reassembled and so much better, but still a very long pull.
Used a marker I covered the contact surfaces, reassembled and dry fired a few times, took it out and seen how much the hammer contacted the sear, filed off 80% of the hammers contact edge, repolished, dab of grease and reassembled, I will show trigger pull tests when I get back to work and use the gauge but man oh man is this sooo much better. Vast improvement over stock.

Still not a target trigger, but for a combat/defense weapon it's perfect .
 
#5 ·
I do work on guns for a living if you must know.
Not necessarily MUST know. But if you are going to describe mods like this in a gun forum you have been a member of for less than a month you are likely to get some cautionary advice. It's the nature of the beast. ;)
 
#12 · (Edited)
Yes I have. After installing the MCARBO trigger kit I found that the take up was very excessive. I know they are working on an upgrade trigger bar, but not wanting to wait, I decided to make my own. After examining the action, I determined the shortcomings of the trigger bar and why the take up is horrible:
Finger Bumper Vehicle door Thumb Hand


The sear notch wants to ride up the inside radius combined with the fact the "gap" is excessive which allows all that travel. I first bought a $5 replacement from KelTec then went to work using the new one as a template. Using some thin steel sheetstock, I cut out a rough shape:
Bumper Font

Then began the tedious task of filing...then filing...then filing some more:


Inside the notch where the sear pin rides, special attention was used to make sure all burrs and filing scratches were removed to insure a smooth action. Emery cloth cut into thin strips was used to sand this area to a mirror finish. 320 grit ending with 2000 grit was used:
Clamp

Tool Antique tool


Next, the whole bar was sanded smooth and polished:
Wood Metal

When stacked ontop of one another we can see the tiny bit of material that was "added" to the factory bar:
Bumper Auto part


The only thing left to do is to bend the tabs over and do a heat treatment. Everything was done by hand with the exception of drilling out the holes which was done with a drill press..I'm confident the take up will be reduces significantly, and the trigger pull will be much more positive. If its an epic failure, then I'm out only $5 and time..


All Done.....

Font Wood Handle Pipe Metal

Iron Font Handle Metal Wood
 
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