MNGunTalk.com

I installed my first Geissele trigger into the DD5V3 and immediately started having issues. Hoping someone here has a fix or I’ll just call customer service.

The issue is the hammer not resetting properly after firing. The gun cycles normally, but I had many dead triggers on a loaded chamber. Inspection of the round shows a light impact on the primer so the hammer is definitely coming down and I’m pretty certain I also had a double fire.

Any ideas on further diagnosis or a fix?

Which model trigger?

Ghost wrote:Which model trigger?

SSA-E

Maybe check that you have the hammer spring installed correctly.

speedy396 wrote:Maybe check that you have the hammer spring installed correctly.

Looks right to me, but here it is:

MasonK wrote:

speedy396 wrote:Maybe check that you have the hammer spring installed correctly.

Looks right to me, but here it is:

Looks to me you have the hammer spring on the wrong side of the hammer.

Hammer spring is seated correctly; I can verify that visually. The spring rides a lot higher than a mil spec trigger spring. I should have attached the hammer down pic as well since it's easier to see the spring is behind the hammer. Also, I don't think the hammer would work at all if it was backwards.

When you say "dead trigger" what do you mean?

When the problem occurs, does the hammer follow the bolt closed or is it locked back?

Rip Van Winkle wrote:When you say "dead trigger" what do you mean?

When the problem occurs, does the hammer follow the bolt closed or is it locked back?

The hammer is following the bolt into the closed position.

The gun fires, bolt cycles, new round is chambered, but it appears that the hammer isn't being captured by the disconnector and is riding back into the firing pin automatically. This is causing either the trigger to not reset at best (because the hammer is in the 'fired' position, or even fire the second round automatically.

Your lower may have a screw coming in from the grip. This is a common method to reduce reset distance. If you screw in too much into the trigger group, it causes the problem you are describing.

It looks to me like your hammer spring is bent forcing the left leg out and the top of the coil inwards onto the surface where the disconnector hits. I’d try a new hammer spring rather than bend the old one.

Could the gun be cycling but short stroking? Heavy buffer? Not enough gas? I am not that familiar with AR triggers but this one does not seem to have any adjustment screws.

gun_fan111v2 wrote:Could the gun be cycling but short stroking? Heavy buffer? Not enough gas? I am not that familiar with AR triggers but this one does not seem to have any adjustment screws.

I was thinking about that, but short stroking wouldn't allow for the next round to get picked up. The hammer gets dropped into the disconnector when the bolt reaches half-open (before the spent round is even ejected).

Just heard back from Geissele CS. They looked at the pics and said everything looks in order.

Current recommendation from them is that I should adjust my grip to see if that makes a difference.

Grip? Meaning to hold the trigger firmly back until the recoil cycle is over?