The M240 Machine Gun traces the development of the weapon, currently the primary medium-weight machine gun of our military, through the latest configuration, the M240 SLR, designed and manufactured by Ohio Ordnance. When the United States military determined during the late 1970s that it was time to find a replacement for older machine guns in the services, they initiated an extensive search for a weapon that would fire the 7.62 Nato round and prove economical, adaptable in many configurations, relatively lightweight, accurate, and more reliable than its predecessors. The clear winner was the Belgium-made Fabrique Nationale MAG, later adapted and renamed the M240, a belt-fed 7.62 air-cooled weapon easily adapted for use on ground vehicles, aircraft, and seagoing craft and light enough to be carried and operated by a single soldier. Today the M240 is the primary medium machine gun of our armed forces and of many of our allies across the globe. "Relatively few fully transferable MAGs are in civilian hands, and the cost of a transferable MAG of any sort is upward of $70,000. Ohio Ordnance Works (OOW) is offering a semi-automatic-only version of the M240 as its M240 SLR (for self-loading rifle). The M240 SLR is a mix of original M240 components and parts designed and manufactured by OOW. The right sideplate, which is the receiver according to the BATFE, is thicker than the military M240 and the interior parts have been reduced accordingly to ensure that fully automatic components cannot be inserted. Further, the SLR cannot accept a military trigger group or operating rod."-National Rifle Association Staff