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2/29/2008 6:30:03 AM EDT
Have there been any problems with superior arms lowers in the 4000 ser# range?  I remember some time ago about some problems with the bolt catch machining, but didn't find anything in a search.  I just have an opportunity to pick up a couple stripped lowers and wanted to be sure they are ok.  Only thing I have noticed in looking at them is that one has a bulge on the side of where the trigger set screw is machined.  I slid a standard pistol grip on it and it was a little tight but worked fine.

Thanks

C
2/29/2008 1:37:36 PM EDT
[#1]
Curious myself
2/29/2008 1:38:53 PM EDT
[#2]
I have had 3 of them, still have 2, none of mine are in the serial number range mentioned, but I haven't had any issues with them.

The third one is now owned by a friend of a friend, and he hasn't had any issues with it either.
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