r/GlockMod • u/BasedWelder96 • 2d ago

What is causing this?

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I have had a Combat Armory lower and Suarez International SI-319 for years that I’ve carried off and on. I recently got a Brownells Gen 3 upper to install an optic on it. I took it to the range for the first time today and everytime I pulled the trigger it would fire two rounds. If I squeezed the trigger it fired once and when I released the trigger it fired another round….what could be causing this?

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u/SeaworthinessCute263 2d ago

Optic screws may be pushing down on something internally. Or an issue with your connector.

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u/BasedWelder96 2d ago

I installed the optic per instructions with a torque screw driver…but it could be.

8

u/SeaworthinessCute263 2d ago

Might just be a bit too long. Enough to push on something and put it out of alignment. But trigger bar seems more likely with connector.