[youtube]http://www.youtube.com/watch?v=D7stLQvsDX8[/youtube]
There are quite a few videos of this on youtube. I tried it out but couldn’t even get close to clambering a round (snap cap in my case). I’m skeptical that these guys have factory springs in their guns… at the very least I’d say they would have a VERY “broken in” factory spring. I haven’t seen anyone do this in real life with a stock glock yet.
Maybe i’m just not quick enough. Once my shoulder and elbow recovers i’ll give it another try.
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There appears to be a weight near where the rear sight would be on the slide of this gun. Running a light return spring would allow you to use inertia to operate the slide like that.
I don’t know Jason… I’m pretty sure that is just an aftermarket rear sight.