This budget gun that John(Mad Scientist) speaks of is of course mine. It shoots almost as flat as my STI and Caspian open guns. Don't let the size and weight of it fool you. It's fast on the transitions and splits are right on. At 15 yards the dot rises about an inch or two. The pain staking grip work that John does is top notch and is extreamly affective. I have got some strange looks from people,They ask"what the f$%K is that" then I let them shoot it. The tone changes quickly. I can't say enough about John and the work that he has done for me. I will say, If you are going to try to build an open Glock,don't bother,just send it to John.