Originally Posted by
ViniVidivici
Shot in the dark here, but measure the width of the trigger guard, in a few places, and compare it to the other guns.
I know your variance is between 2 guns of the same gen..
But it annoys the crap out of me when I've encountered this. Going from a 2nd gen G17, to a 3rd gen G19, to a 4th gen G19, in the SAME holster, they'll feel different, retention-wise.
The slight differences with the trigger guard, from gen to gen, make the difference. I'm thankful for adjustable retention.