I have found a good deal on a Daniel Defense 9.5 FSP Lite Rail, but its the older style with the holes drilled along the bottom. Will the AA carbine kit work with this rail?
Here is a thread on the DD board talking about the two different versions.
Call Jake Arnsdorff sales rep. at DD. his number is 912-851-3253 he should be able to answer your questions pertaining to the changes between the two rails and let you know if the only change was to the bottom rail or if it affected the upper portion as well.
Is this the rail you're talking about?
I have this rail with an Adams Arms kit. It works perfectly.