I'm assuming you're talking about a free float rail. I'm partial to the LaRue rails Because they aren't as tall as the DD ones. Most of the DD ones, however, are lighter. I like the idea of a shaved FSB so long as you have a way to refinish it. You'll also want to make sure that a shaved FSB will fit under the rail you choose without removing too much material. There was a thread somewhere about a cracked FSB that was shaved down. I suspect it was because the guy ground off too much material around the bayonet lug and the residual stress from the forging process caused it to crack.
Last edited by Eric D.; 12-12-10 at 19:22.
B.A.S. Mechanical Engineering Technology
Bookmarks