Originally Posted by C0untZer0
You should be able to measure it. This is basically the distance that your trigger finger has to reach while the pistol is in the web of your shooting hand. The back of the grip to the trigger face.
I did measure the distance on my 3rd Gen G19s and G34s and got the same measurement as you. I don't have a Timberwolf to measure.
The point I was trying to make is that it appears that LoneWolfMarketing was measuring not from the back of the grip, but from the trigger housing pin hole.