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Posted: 8/26/2006 6:26:13 PM EDT
Where can I find instructions for drilling and reaming an FSB and new barrel for taper pins? Especially maintaining index during machining.
Link Posted: 8/26/2006 6:38:56 PM EDT
[Last Edit: 8/26/2006 6:40:49 PM EDT by Y4145]

Originally Posted By drsmooth:
Where can I find instructions for drilling and reaming an FSB and new barrel for taper pins? Especially maintaining index during machining.


I've done it a few times, but using dowel pins instead of taper pins. What I did was tap the hole under where the sling swivel mounts, and installed a set screw. I took it out to the range, shot it and adjusted it until my rear sight was perfectly centered, then took it home and drilled it using a standard drill press and vise and installed the pins. It was actually really simple. The set screw held it in place enough that it didn't move when I drilled, and I didn't even disassemble the upper.

The important thing, if you use a dowel pin, is to use a drill bit that's about .001" undersize. Like I had 1/8" dowel pins, I had the drill bit ground .001" so the pins fit tight. Otherwise, they'll be loose. Guess how I found that out. Taper pins, you'll need a taper pin reamer.
Link Posted: 8/26/2006 6:42:42 PM EDT
Thank you very much, sir!
Link Posted: 8/26/2006 6:46:08 PM EDT

Originally Posted By drsmooth:
Thank you very much, sir!


No problem, IM me if you have any other questions. The set screw method works really well, and I just leave it in place. You can install the sling swivel and not even notice it, unless you know it's there and look for it. I might have a few extra around if you need one, I use short 8-32 ones I think they were.
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