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Posted: 3/11/2006 3:09:24 PM EDT
I just got a new AR together(that would be #2 now). The barrel has a bit of a wobble, maybe about 1/16" of wobble space. I made sure that the front sight was lined up with the bore, I couldn't tighten it anymore otherwise the front sight wouldn't line up correctly. Will it be ok with that little bit of a wobble from side to side where the barrel mates with the upper? Thank you for your time.
-Don
Link Posted: 3/11/2006 3:18:46 PM EDT
Your barrel SHOULD NOT wobble!

How tight is the barrel nut?
The index pin on the barrel ext. should prevent most FSB canting
(anything else can be made up with the rear sight)

Either something is wrong with your upper receiver, or you just need to crank the barrel nut a bit more.
Link Posted: 3/11/2006 4:34:30 PM EDT

Originally Posted By ds42102:
I just got a new AR together(that would be #2 now). The barrel has a bit of a wobble, maybe about 1/16" of wobble space. I made sure that the front sight was lined up with the bore, I couldn't tighten it anymore otherwise the front sight wouldn't line up correctly. Will it be ok with that little bit of a wobble from side to side where the barrel mates with the upper? Thank you for your time.
-Don



NO! something is definitely wrong. There is a stub on the barrel that fits in a notch in the upper receiver, is this where the 1/16" "wobble" is coming from. If so line up the fsb and when you tighten down the barrel it will lock it in place, preventing any movement of the barrel stub in the receiver notch.
Link Posted: 3/11/2006 5:10:02 PM EDT
Link Posted: 3/11/2006 8:21:14 PM EDT
Maybe the index pin (at the barrel extension) didn't go into the 12 o'clock notch on the upper receiver?

If done properly, the barrel may flex. but not wobble.

lord
Link Posted: 3/11/2006 8:32:27 PM EDT
no wobble and whats this about lining up the front sight?


are you missing the index pin?
Link Posted: 3/12/2006 7:35:56 AM EDT
Well all of the pins and everything lined up fine, I only noticed when i got the surefire rails installed, then I put the forward grip on and noticed it moved, at first I though it was the rails but I saw that it was the barrel that was moving. Now when you say "flex" what exactlly are you reffering to. If i move the forward grip to the right or left really hard it moves
Link Posted: 3/12/2006 8:11:42 AM EDT
Link Posted: 3/12/2006 9:05:39 AM EDT
Link Posted: 3/12/2006 3:11:44 PM EDT
[Last Edit: 3/12/2006 3:12:38 PM EDT by FMJ]
Stick man took words out of my mouth

play is okay if so?
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