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AR15.COM
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8/5/2009 5:56:39 PM EDT
Sorry if this has been asked before everyone, im a noob to ar style rifles.  i wanted to know what a free float rail system is and what the advantages, if any, are over a non free float.
8/5/2009 6:03:02 PM EDT
[#1]
The advantage is that a ff can give you better accuracy. However on a 16 M4 it will be minimal.

On a longer barrel the effect will be greater. For the non FF can be stronger and also you can

mount a grenade lancher on one if you can get that ok by the ATF.
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