The bolt also has a cartridge casing extractor, while the ejector is located inside the trigger housing (the ejector is lifted by a spring in the front of the trigger housing. The recoiling bolt carrier pushes the rear of the ejector down insuring the ejector is lifted into place to insure ejection is timed properly). The weapon is hammer-fired and has a fire control lever, which is also the manual safety. The safety and fire selector lever is located on the left side of the receiver, directly above the pistol grip, and has three settings: "S" (Spanish: Seguro)—weapon safe (trigger is disabled mechanically), "T" (Spanish: Tiro a tiro)—semi-automatic fire and "R" (Spanish: Ráfaga)—fully automatic fire (initial production rifles also had a burst selector option, which was abandoned). The Model L fires from a closed bolt position and uses the NATO-standard 5.56×45mm cartridge loaded with the 62-grain SS109 projectile. INI (Instituto Nacional de Industria, a state factory) made ammunition was dirtier and gave much more chamber pressure than standard NATO ammunition, and was one of the sources of reliability problems (hard primers were in part responsible, too). At NATO joint exercises, foreign units tended to be warned not to use Spanish ammo if their rifles were gas operated.