Question to the Machinists

[n8thegr8]

I'm looking to put some tritium night sights on my 92fs and I don't want those slip over ones (as I've made some kydex holsters that would probably not have enough clearance). I also don't want to send off the slide and pay $150 to have it done. I'd also like to avoid doing a beavertail, if at all possible. Therefore I'm left with the question of how the installers manage to drill it out. Only way I can imagine is direclty on the hole with a really long shank bit, or trying to drill it from the back side. Any ideas? This is purely a thought exercise at this point, as I don't even have a drill press at this point. I just have a problem where I look at things and wonder how it's done, lol.

 

[mr ed]

EDM machine. Electrical discharge machining I think is the proper term.
Same way they magna-port guns. Computer operated, very precise.

 

[grwd]

I'd I were to do it, I'd drill it from the back then just backfill with black epoxy after the vial install.

 

[n8thegr8]

I'd I were to do it, I'd drill it from the back then just backfill with black epoxy after the vial install.

That's pretty much where I'm leaning. Probably drill a small pilot hole to try and find center. I've actually thought about leaving the back open to catch light during the daytime.