I have one PG2733 on my main carry mag for my 26 to give me an overall 12+1. I have recently retired the 26 from my normal carry rotation and now it resides in my maxpedition bag that I use when going camping/hiking. I was at the gun store yesterday and picked up what I thought was the PG39 but the package said PG XL and that it adds 2 rounds to the .40/.357 and 3 rounds to the 9mm. My PG2733 folows the G26's countours very well. The adapter curves out to meet up with the last finger bump at the bottom of the 26 grip. The one I got yesterday, the PG XL, does not meet up with the curve in the finger groove at all which leads me to believe I do not have the PG 39. Does anyone have a side view shot of the PG 39 in a 26/27/33 where I can see where the adapter meets the finger groove on the grip?