
Originally Posted by
750.356
My FCGs were the heavier 3.5-4lb option, done by Bill pretty recently (6-7 months ago), so I would assume he's using the same technique.
The group that went full auto was from an RRA LPK, the second one was from a CMT/Stag LPK.
I believe it was wear on the front engagement surface of the trigger that caused the malfunctions, but I can be 100% sure. All I know is that after following through with a shot (holding the trigger back), the hammer would fall when I would reset the trigger. This would lead to inadvertant bump firing from the shoulder, and strange looks at the range.
One issue that may be of importance was the fact that the RRA trigger (that went full auto) was brand spanking new out of the LPK bag when it was sent it Bill. I've speculated that it may be beneficial to shoot a new trigger for a few hundred rounds before a job like this, as the newly machined trigger/hammer surfaces will accumulate a bit of self-limiting wear as they break in.
Could doing a super crisp trigger job like this (with such a small amount of trigger/hammer engagement) on a new FCG that hasn't accumulated this few thousandths of 'break-in wear' account for my problem? I'm not sure, but I'm going to continue my schedule of dry fire training on this FCG to see if that could be the case.
Either way, Bill's trigger job has the highest cost to performance ratio of any other upgrade I've seen for an AR (recreational shooting, paper punching accuracy-wise). Whether it's appropriate in a fighting gun remains to be seen.
I'm about 700 snaps into the trigger that Bill fixed with no issues yet. I'll report back if I experience any.
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