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6/1/2012 11:23:17 AM EDT
I'm pretty sure the answer is no, but does it matter whether a flash hider's caliber is .223 or 5.56. You can mount a .223 flash hider on a 5.56 barrel and safely shoot 5.56 ammo with it unlike shooting 5.56 ammo through a .223 barrel correct?
6/1/2012 11:24:30 AM EDT
[#1]
does not matter.

6/1/2012 11:24:37 AM EDT
[#2]
Right.

http://www.ar15armory.com/forums/556-223-Ammunition-Ch-t22582.html
6/1/2012 11:25:46 AM EDT
[#3]
The bullet diameters are identical (.224").
6/1/2012 11:44:45 AM EDT
[#4]
What Lew said ^.....Bullet diameter is king....   .224 is the diameter of the bullet whether its a .223 or 5.56

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