From what I have read, and heard from other members experienced with the bar-10, the sears are very weak. Apparently they wear down fairly quickly without any spring upgrade, and it would be even quicker with one.
I think replacing the sears or the trigger box in entirety would be a good idea. Just my two cents though.
I think replacing the sears or the trigger box in entirety would be a good idea. Just my two cents though.