If this AR's trigger slaps my finger then what would be the cause?

lavino

lavino

CGN frequent flyer
EE Expired
Rating - 100%
2   0   0
Location
Where you can find the most expensive condos...
This one still has the factory trigger and I have checked it and found nothing unusual about it visually or any scratches or shiny area where it should have. When manually testing racking it and etc I felt zero 'force feedback' from any of the action on my finger. It doesn't really hurting my finger as much as it is annoying as it will really affect my follow up shots it is very distracting.

These are the factors to consider:

I was shooting American Eagle 223 55gr only

Everything else is factory except I was using a Rainier Nickle Boron complete BCG instead of factory BCG

Buffer weighted at 2.85 oz ... I thought carbine should be 3 oz but anyway I got new and heavier buffers coming in mail soon


Will any of these factor contribute to the finger slapping?

1) over gas and cause the bolt returns too fast or too early?

2) I was shooting it with my stock at shortest position so may be I was not pulling my right hand close enough and ended up with a gap between my finger and the trigger?

3) I have a much softer stock bump pad replaced. Will this affect something?

4) something else?

Never had this happened to my other guns.
 
Can you see any impact point on the disconnector where the hammer is contacting it? That's generally the mechanism: hammer goes far enough back to hit the disconnector, which drives the back of the trigger down.

The two things that I could see causing that are the profile of the cocking ramp on your aftermarket bolt, or as you said a high bolt velocity.
 
Your rifle is severely overgassed, I had the same thing happen a few years ago with an NEA barrel in a home build.
Adjustable gas block, is the best fix if you don't want to replace the barrel. You might get away with a heavier buffer and/or recoil spring but it's probably not enough if it's hitting you that hard.
 
cr5 said:
Your rifle is severely overgassed, I had that happen a few years ago with an NEA barrel.
Adjustable gas block, is the best fix if you don't want to replace the barrel. You might get away with a heavier buffer and/or recoil spring but it's probably not enough if it's hitting you that hard.
Click to expand...

It is a gen 1 NEA upper (you are spot-on) so I will either contact BCL (who knows how long it will take) or try the following in order:

1) use the factory BCG
2) update with heavier buffer
3) update the adjustable gas block

If all else failed I will try a diff upper or barrel. This is good learning experience though.
 
lavino said:
It is a gen 1 NEA upper (you are spot-on) so I will either contact BCL (who knows how long it will take) or try the following in order:

1) use the factory BCG
2) update with heavier buffer
3) update the adjustable gas block

If all else failed I will try a diff upper or barrel. This is good learning experience though.
Click to expand...

I doubt you will get much from NEA/BCL as it does function.
Unless your Rainier BCG is a low mass unit there should be no reason for it to be the problem.
If your problems started when you swapped the BCG but it was fine before I would guess that your gas rings on your original bolt are worn out and were hiding the overgassing issue.
I would go straight to the adjustable gas block but since you already have new buffers on the way try them first, it might be enough to at least get rid of the trigger slap issue but it will still be overgassed and will cycle more harshly than it should.
 
You must log in or register to reply here.
Back
Top Bottom