for my bushy carbine. I need to put my eotech a bit further toward the muzzle to make room for my cheapo magnifier/BUIS. also I'm going to add a vertical foregrip and a light of sort sort. standard stuff. I am looking at a two piece. should I be looking for a free-float? I have a fixed front sight post, and I was for some reason under the impression a free float tube wouldn't fit over it. the top rail must be perfectly even with the flat top on my upper, as the eotech will be at the end of the flat top but hanging over unto the quad rail. is this normal, even if it isn't mentioned in the description? anyway, this is what I have Midwest Industries Handguard 4-Rail AR-15 Carbine Length Aluminum Black http://www.midwayusa.com/viewProduct/?productNumber=793469 DoubleStar 2-Piece Handguard 4-Rail AR-15 Carbine Length Aluminum Matte http://www.midwayusa.com/viewProduct/?productNumber=463458 EOTech 2-Piece Handguard 4-Rail M4/AR-15 Carbine Length Aluminum Matte http://www.midwayusa.com/viewProduct/?productNumber=452069 they are all the same price, so cost does not matter. whatcha think?