The SAM-R (Special Applications Scoped Rifle) is a precision rifle used by the United States Marine Corps (USMC). It is a modified version of the M16A2 service rifle, which has been in use by the USMC since the 1980s. The history of the SAM-R can be traced back to the early 1990s, when the USMC began looking for a rifle that could provide better accuracy and range than the standard M16A2. The goal was to create a rifle that could be used by Marine snipers to engage targets at longer distances than was possible with the M16A2. The first version of the SAM-R was introduced in the mid-1990s, and it quickly proved to be a successful platform for snipers. The rifle was chambered in 5.56x45mm NATO and had a free-floating barrel, which helped to improve accuracy. It also had a match-grade trigger and a heavy, fluted barrel, which helped to reduce barrel heat and improve accuracy over sustained fire. Over the years, the SAM-R has undergone several revisions and upgrades. The most recent versi

  The M21 SWS (Sniper Weapon System) is a semi-automatic sniper rifle that has been used by the US military and law enforcement agencies since the early 1970s. It is a modified version of the M14 rifle, which was the standard issue infantry rifle of the US Army during the Vietnam War. History: The M21 was developed to address the need for a more accurate and versatile sniper rifle than the M14. It was developed by the Rock Island Arsenal in Illinois in collaboration with the US Army Marksmanship Training Unit. The M21 was first introduced into service in 1975, and it quickly proved to be an effective weapon for snipers. The M21 is based on the M14 rifle, which was developed in the late 1950s. The M14 was designed to replace the M1 Garand rifle, which had been the standard issue infantry rifle of the US Army since World War II. The M14 was semi-automatic, which meant that it could fire one round with each pull of the trigger. It was chambered in 7.62x51mm NATO, which was a powerful cart

 The American Rifle ( , M14) was an American combat rifle with a 7.62 × 51 mm NATO rifle and single - shot capability. Mostly replaced by M16 rifles in the United States Army, U.S. Marine Corps, and U.S. Navy, but limited use in the nama fields is limited. The M14 rifle is also the basis for the M21 sniper rifle and the M25 sniper rifle. It was also the type of rifle used only for five years (1959–1964), the shortest time in American history. The M14 EBR (Mk.14 EBR) is now modernized and used as a support rifle, and is used by the U.S. Marine Corps as an M39 EMR designated rifle to increase the length of the gun and remove the automatic firing system. In the United States, the M1A is sold to the private sector as a semi-automatic rifle, and is mainly used in hunting guns and shooting sports over the size of deer. In 1943, the ministry planned to completely and automatically renovate the M1 Galland. After research, the T20 was created in 1945 under the leadership of M1 designer John C.