The Daniel Defense AR15 Lite Rail utilizes the Patent Pending Bolt Up SystemTM which allows the upper receiver to have a continuous uninterrupted upper rail platform.
The Daniel Defense 9.5 FSP Free Float Rail System features a cut in the front of the top rail to accommodate the front sight post and gas block of a carbine length AR15 gas system, while at the same time, providing much needed additional rail space along the sides and bottom rails.
More rail space means enhanced capability for modern rifle accessories