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AR15.COM
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1/15/2005 10:04:28 AM EDT
You apply force to the side of your barrel at the same time you apply opposite force to your handgaurds? Get what I'm trying to say? Grab both at the same time and tweak them away from each other. I recently droped my AR right on it's side, it landed on the Surefire. no big deal but the next time I shouldered it I noticed the Aimpoint dot was off to the side, So I i grabed the barrel and the handgaurd and noticed that     I can slightly move one of them, I don't know which. I'm running a RASII with an Aimpoint in a LaRue mount if  you're wondering. Oh yea, it's an HBAR. The movment looked minor but after looking though the Aimpoint i'd imagine zero was thrown off a few inches at 50yds. I took the RASII apart and put it back together again but there's still movement.  It feels solid when in use though.

thanks
Ants
1/16/2005 10:03:17 AM EDT
[#1]
bu bu bu bu bu bu bump unit]
1/16/2005 6:15:22 PM EDT
[#2]
If your barrel is moving, you need to tighten it.  I doubt the RAS II is moving, based on its design.
1/16/2005 7:03:55 PM EDT
[#3]
Similar to a tuning fork, a free floated handguard and a barrel can be moved relative to each other with pressure.

The whole point of free floating is that force on the FF tube won't affect the barrel relative to the receiver (besides receiver deflection).

If something is actually LOOSE, you've got a problem.
1/16/2005 9:51:11 PM EDT
[#4]
Nothing's loose. Do your freefloaters change zero if you drop your gun on its barrel or forend?
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