Too Bad...
Let me start by saying I have purchesed at least a dozen lowers from 17 designs, and have loved them. All were for an AR 15 and not a AR 10 (LR-308 Gen 1). I was very sad to see these guys go away. That being said. This upper does not fit the 17 designs AR 10 (LR-308 Gen 1) lower at all! Super loose and the lines are so far off its almost like they were for a different gun. hopefully it will cycle proper and I wont have any issues once I put plugs under the upper. really wish this would have worked better, but at least it was a good price. I used the 17 desings large frame upper and lower on this build. I tried to upload a pitcture but couldn't get the file small enough.

