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4/18/2021 9:59:29 PM
Posted: 6/3/2008 10:21:14 AM EDT
I bought a carbine FF tube off EE and the existing stud indexes at about the 2 o'clock position (when viewed from the rear) when tightened up on my upper.  

Question:  Are there shims or washers specifically made to index screw-on FF tubes correctly so that the stud properly locates at the 6 o' clock position?

I suppose I could just drill/tap another one and fill the existing hole with a set screw.
Link Posted: 6/3/2008 10:24:37 AM EDT

Quoted:
Question:  Are there shims or washers specifically made to index screw-on FF tubes correctly so that the stud properly locates at the 6 o' clock position?
None that I've ever seen.  Closest thing would be shims to reindex the barrel nut itself.
Link Posted: 6/3/2008 1:23:17 PM EDT
What type of tube is it?  Did it come with a locking ring for the tube to fit over the barrel nut?  Or is this a one piece type?

Some pictures amy help if you have the capability.
Link Posted: 6/4/2008 5:40:37 AM EDT
Just the tube and barrel nut.  It's about as basic a FF tube as you can get.  I'll see if I can get a picture to help show the problem.
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