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Posted: 9/12/2004 3:28:41 PM EDT
I have now an 80% lowers - fortunately I got them a couple of years ago, and got them cheap.

I tried using the big (1&1/16) drill bit, and messed up the alignment. Pretty annoying, because I had already ton a lot of work on it.

Maybe it would go better with some vises in the drill press, except my drill press is not big enough, so I swung the top around.

I tried the reamer, but it does not appear to cut well enough. I found a web site where the reamer was tapered, but I have no idea how to do that, any suggestions?

thank you


Link Posted: 9/12/2004 4:55:47 PM EDT
Find a local welding shop and have them run a bead of aluminum wire weld in the buffer tube hole and start over.
Link Posted: 9/12/2004 5:19:10 PM EDT
Ideally there should be a fixture which locates off the takedown pin holes which has replaceable drill bushings.

1 size to ream the tap drill size
1 size to act as a tap guide.

I used a boring head (in a Bridgeport Knee mill) to be sure hole was both proper size and position.

80%'s can be completed with just a drill press and hand tools, but require supporting fixtures to get it right.
Link Posted: 9/23/2004 3:40:24 PM EDT

just JB weld the buffer tube on permanetly.... should work just fine.
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