If all of can read well read the M21 page post above and and says clearly:
n 1991, the military updated the M21, primarily by the addition of a McMillan M2A bedded stock and designated it the M25. These are still in use by various Special Operations units. One might note that one of the two Delta Force snipers, Gary Gordon, used one of these rifles during the rescue of Michael Durant during the Battle of Mogadishu in 1993 and is also portrayed using one in the movie Black Hawk Down
If you're short of everything except enemies, you're in combat.
Father of fear, reckless and widowmaker