Daniel Defense M4A1 RIS II FSP


At the request of military units, a new Daniel Defense RIS II rail was designed and manufactured. This rail appears to go back to the roots of the initial DD RIS II rail that was entered into the early rail trials. The Front Sight Base (FSB) passes through a slot in the top rail. This permits continued use of the standard FSB, along with the enhanced strength that the a pinned gas block brings. The should allow for armorer level installation for many Law Enforcement and MIL organizations.

Unlike its prototype sibling, this does not have screw heads which protrude from the rail sides. The bottom rail is still removable for grenade launcher attachment, but a flat head screwdriver will need to be used to remove the four screws. Once this is done, the bottom sections pulls away, and the grenade launcher mounting points swing down for easy access.


While shown below with black type III anodizing, the Daniel Defense M4A1 RIS II FSP is also available in the SOCOM specified FDE type III anodizing as well.