uses the KAC Free-Floating Rail Adapter System, which provides a modular mounting location for all types of equipment. SAM-Rs are usually seen with Harris swivel bipods attached to this rail via a KAC bipod stud. See also United States Army Squad Designated Marksman Rifle References External links MCWL, Project Metropolis Tactical Warrior Experiment: Phase Two, Guam MCWL Experimentation Campaign Plan (ECP) 5.56×45mm NATO semi-automatic rifles ArmaLite AR-10 derivatives Designated marksman rifles Sniper rifles of the United States United States Marine Corps equipment Military equipment introduced in the 2000s