16" LW, 'medium length' upper, flat-top -recommends

by Slow Hand , Indiana, Wednesday, October 30, 2013, 05:34 (4047 days ago) @ John Meeker

I've built three or four rifles on Del Ton kits. You can get a full kit minus stripped reciever for under $500.

http://www.del-ton.com/ar_15_kits_s/1.htm

All of the ones I have built have been reliable and accurate.

I have used several YHM free float tubes, they have one that has a full rail on top and short rails on the front few inches left right and bottom. They are a bit big on diameter. For a nice thin slick rail, I really like the one in my Troy carbine. Nice, but they ain't cheap!