AR15 rear sight pinning


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Mr White
June 25, 2007, 04:33 PM
Does anyone have experience pinning the rear sight housing on an AR-15?
This is done on match service rifles to keep the rear sight housing square to the receiver.

Is this something that an amatuer gun tinkerer could attempt or is it something best left to a pro?

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simmonsguns
June 25, 2007, 06:29 PM
I drill a second spring and detent hole in the ones i do, it tightens up the whole wobbely mess of the standard ones.
I don't think this is a job for someone who does not have good end mills and a mill but someone else might have a way to do it.

DnPRK
June 27, 2007, 10:49 AM
The technique I use is a little different from that used by simmonsguns. I use a drill press to drill a small hole in the sight base on the left side opposite the spring detent hole. Into that hole I epoxy a short stub of drill rod so that about 1/8 " sticks out. I then test fit the sight base into the carry handle and use a jeweler's file to dress down the stub until the site base sits square. Then reassemble the sight. You now have a site base that sits square through it's range of vertical travel.

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