polymer

Has anyone used one of the Polymer80 pistol frames? I've been thinking about building one of these custom Glocks but the current full sized frame doesn't have steel rear slide rails. The compact frame (expected to be released Feb. 2017) comes with drop-in steel rails so I think I'm going to go...

Midway has them on-sale for $99 and I wanted to see if anyone had built one. For those who haven't heard of it: http://www.polymer80.com/Pistol-Frame_ep_60.html It's an 80% lower that is compatible with Glock 17/19/34,22,24,35 slides. I'm eager to build one up, but I want to make sure it's...