Barrel size of FDPCP

[StevenG]

One of the Allen screws in my tko is not turning. The hole in the tko is fine, but the Allen key spins in it. I have moved it only once. It is nicely centered it seems, but still makes me a bit uneasy. Might be my cheap Allen tools.

[gashinshotan]

I didn't even bother screwing those in and just tapped it a bit so the friction holds it. I doubt it'll come off - just been shooting with my ghetto front sight and it didnt lose zero once.