G26.I'm not sure about the model you won, but I do know that you have to be sure you get a Gen3 parts kit for a 17. I bought a lower parts kit from a big vendor at a gun show that alllllmost worked. After a lot of in and out and fiddling around and comparing it to a real Glock, I determined that the trigger bar was simply too long. It would fit in, but the trigger just wasn't right. I never tried it with live ammo, but it would indeed dry fire. In fact, it would dry fire without even pushing in the safety lever in the middle of the trigger
I took it to my LGS who immediately said, "That's a Gen4 trigger, see the little dimple right there? Dead giveaway." All the other parts seemed to be the same, and he got me a proper Gen3 trigger. It could have been really dangerous.
This picture from the web highlights the little dimple or "bump" on the part that lifts the firing pin block that makes it clearly Gen4, not 3: