I have an AR-15 A-2 rifle. I want to put accessory rails on my forearms. it looks like they make bolt on rails for rifle length forearms are they any good ? solid non moving. Quad rails are very expensive, for me any way. what are free floating forearms?are piston operated bolts better than gas other than cleaner. would like to install a bi pod and maybe a flashlight but want it solid. thanks for any and all advice don w.
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