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Posted: 2/16/2006 1:19:07 PM EDT
I recently purchased my third Bushmaster and this has an A3 upper with a YHM flip up rear sight. The rear has to bet to the left just a few turns shy of extreme left. I have checked the rear sight and it is mounted solid and level. Could the front sight be out of alignment from the factory or am I doing somthing wrong.
Link Posted: 2/16/2006 2:20:18 PM EDT
[Last Edit: 2/16/2006 9:37:39 PM EDT by Dano523]
never mind guys, just took to the range and shot from a secure bench rest. found that the barrel is canted to the left. called bushmaster and talked to tech support. they stated that this happens occasionally. they want the rifle shipped back to them to have the barrel checked and re-torqued. this stinks...

Link Posted: 2/16/2006 5:09:21 PM EDT

Originally Posted By desertshadow2005:
They stated that this happens occasionally.



It seems to happen quite frequently here lately with Bushmaster rifles. The problem is that the barrel is overtorqued, which causes it to cant in the upper receiver to the left.
Link Posted: 2/16/2006 9:37:54 PM EDT
Link Posted: 2/17/2006 3:05:53 AM EDT

Originally Posted By desertshadow2005:
they stated that this happens occasionally. they want the rifle shipped back to them to have the barrel checked and re-torqued. this stinks...


Occasionally!
Link Posted: 3/26/2006 11:30:28 AM EDT
GOT IT BACK. IT NOW KICKS A$$.
Link Posted: 3/27/2006 8:06:56 AM EDT
Dano: If one were to boresight their rifle at 50 yd (w/o firing a shot), would it be possible to see that the barrel pin was bent causing the canted sight? Or does one HAVE to fire the rifle in order to determine it?

I've boresighted my barrel at 50 yd (looked through the bore, found "target", and adjusted iron sights to match POA) and the windage was always "OK".
Link Posted: 3/27/2006 9:34:11 AM EDT
Link Posted: 3/27/2006 10:13:33 AM EDT
Yes that was the intent for boresighting the rifle. I wanted to make sure my new Bushmaster barrel wasn't canted due to overtorquing the barrel nut. This was on a new carbine build (and a slightly used rifle build that I took apart/re-assembled for a new FFHG).
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