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Posted: 10/4/2004 8:54:54 AM EDT
I just picked up a A1 upper with the pencil profile barrel. I wanted the barrel for another project which is a good thing b/c the MORON that I got it from attempted to drill the small hole out to make a big hole upper. Needless to say it is now out of spec, bad out of spec. When mounted to a lower you can feel the play. When upward pressure is placed on the bottom of the handguard you can actualy feel the upper move up and away from the lower. I've thought about trying to fill it and redrill but don't know if it's gonna' be worth the trouble. I placed it on a Cavalry Arms assembly and it seems to fit this lower the tightest with the least amount of play. What do you think, strip it of usable parts and scrap it or keep it and play with it trying to make it work?
Link Posted: 10/4/2004 9:11:58 AM EDT
I would find something you could use for a bushing and use it as a beater upper. Something with the right ID. Just my $0.02.

The Bill of Rights: Void Where Prohibited by Law

Link Posted: 10/4/2004 9:31:45 AM EDT
One of the few times I'd recommend JB Weld for a gun application. Fill in the takedown lug, mark the correct hole with your lower as a stencil, redrill.
Link Posted: 10/4/2004 9:50:24 AM EDT
Strip it and save it for a rainy day (as opposed to trashing it). When TEOTWAWKI arrives you may need it
Link Posted: 10/4/2004 11:07:13 AM EDT
Use the O ring method of removing play beween the uppers by putting it on the lug where the push pin goes.
Link Posted: 10/4/2004 12:43:29 PM EDT
Sell me the whole mess. I'll JB Weld up the hole and use it with an M261 .22LR conversion, which should be just fine with it.

I'm not kidding. Let's make a deal!
Link Posted: 10/4/2004 2:58:56 PM EDT
what is a JB weld?

i have the same problem with one of my uppers.
someone tried hacking at it to make it a large hole upper.
they did a halfway decent job...as it fits the sp1 lower really good. but i'd like to make it a small hole and get a different upper for the sp1.

i asked a reputable gunsmith and he said he couldnt do anything about it.
Link Posted: 10/4/2004 3:02:49 PM EDT
JB Weld is a really excellent, inexpensive, commonly available 2-part epoxy--ask for it at any hardware store. It MIGHT be suitable for this fix for a .223 gun--but I'm virtually certain that it would hold up almost forever on a .22 conversion.
Link Posted: 10/4/2004 10:21:13 PM EDT
I had the same problem on a used Ebay upper. A good friend with a garage machine shop pressed in (not welded, but simply pressed in and VERY tight) some metal, then drilled the correct size hole in the correct spot. Fits and runs 100%.

Perfect fit:
Link Posted: 10/4/2004 10:45:33 PM EDT
[Last Edit: 10/4/2004 10:47:42 PM EDT by Tweak]
Link Posted: 10/5/2004 12:05:00 AM EDT
[Last Edit: 10/5/2004 12:06:56 AM EDT by Kisara]
One of these?

Whoever drilled it made the big hole in the wrong place. I think they put the correct size drill in the middle of the small hole and bored it out to diameter, not knowing that it should have been slightly offset. When placed on a large hole lower, you couldn't close the upper down. Then they must have figured, "Ditch it on Ebay and it will be someone else's problem."
Link Posted: 10/5/2004 12:05:20 AM EDT
Damn!!! That's pretty good!
Link Posted: 10/5/2004 1:41:41 AM EDT
Link Posted: 10/5/2004 2:01:55 AM EDT

Originally Posted By Kisara:
Ditch it on Ebay and it will be someone else's problem.

Been there, still working through numerous cases of somebody's elses junk passed off as good.
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