The Mk 14 Enhanced Battle Rifle (EBR) is an American military selective fire battle rifle, and a designated marksman rifle chambered for the 7.62×51mm NATO cartridge. It is a variant of the M14 battle rifle and was originally built for use with units of United States Special Operations Command, such as the United States Navy SEALs, Delta Force, and task specific Green Berets ODA teams/units. History Development began in 2000 with a request by the United States Navy SEALs for a more compact M14 battle rifle. In 2001, Mike Rock Rifle Barrels was the only rifle barrel maker asked by United States Special Operations Command to participate in a SOPMOD conference to create what would be the Mk 14 Mod 0 EBR, with details that include a collapsible stock that was requested for the new rifle and with an aluminum body with telescopic rails. Mike Rock collaborated with engineer Jim Ribordy to make the new rifle. Tests showed that their rifle was effective, but had excessive noise problems. In 2003, Ron Smith and Smith Enterprise, Inc. created its own version of the M14 EBR (MK14 SEI), which used a medium heavy weight 457 mm (18.0") barrel and was more widely favored than the rifle made by Rock and Ribordy. The Smith Enterprise-based MK14 was then used as a basis to eventually create the Mk 14 Mod 0 with Springfield Armory, Inc. being tasked to supply the necessary machinery needed to create the weapon in cooperation with the Naval Surface Warfare Center Crane Division. United States Navy SEALs were the first to be armed with the EBR in 2004, followed by the U.S. Coast Guard. The U.S. Army also uses the M14 EBR-RI, being created and updated by the Weapons Product Support Integration Directorate of the TACOM Life Cycle Management Command at the Keith L. Ware Test Facility in Rock Island Arsenal, Illinois; having fielded approximately 5,000 units by mid-2010. United States Marine Corps units were also considering the EBR, but wound up instead developing the M39 Enhanced Marksman Rifle. In early 2017, the Army began writing a new requirement for an SDM rifle for combat platoons and squads. Although the Army has been using the M14 EBR since 2009, they had to be turned in when returning from theater, and it had weight issues being almost unloaded. A new marksman rifle will equip each combat arms squad weighing about firing