50 meter rifle prone (formerly known as one of four free rifle disciplines) is an International Shooting Sport Federation event consisting of 60 shots from the prone position with a .22 Long Rifle (5.6 mm) caliber rifle. The time limit is 75 minutes for the entire match, including sighting shots, or 90 minutes if there is a need to compensate for slow scoring systems. In the 2013 ISSF rules the 60-shot prone match consists of 15-minute preparation and sighting time, followed by the match – 60 shots in 50 minutes for electronic scoring, and 60 shots in 60 minutes for paper targets.