Question for the real AR guys, (I own four but am a piddler not a expert). How much difference does a free float tube make on a rifle with a stock barrel and receiver? I have a Bushy ORC with a 16 inch barrel in .308. It has mostly aftermarket parts from the JP buffer spring to the muzzle brake, along with a 4X12 VXR in a BOBRO. It is very shootable and holds a good group out to 300 yards with 168 gr.ammo so far. It has midlength handguards on it now and I would like to either just install a quad rail or if it makes a sizeable difference a free float tube. Like the idea of just being able to pull the handguards off so if this is more a match grade mod I will pass on it.