SIG SAUER SIG556xi - Manual (Page 14)

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1.1 Protect your eyes and ears
always wear safety glasses and ear plugs or “earmuff” type protectors whenever you are shooting. always make certain that
persons close to you are similarly protected. unprotected eyes may be injured by powder, gas, carbon residue, lubricant,
metallic particles, or similar debris which may emanate occasionally from any firearm in normal use. Without ear protection,
repeated exposure to shooting noise may lead to cumulative, permanent hearing loss.
2.0. mechanical characteristics and weapon theory
2.1 weapon description
2.1.1 general
The Sig556xi rifle is a gas operated firearm with a rotary bolt mechanism capable of semi-automatic, or automatic operation.
Semi-automatic means one round will fire each time the trigger is pulled until the magazine is emptied of ammunition.
automatic means the rifle will continue to fire as long as the trigger is depressed or the magazine is emptied of ammunition.
The rifle is designed to be chambered in 5.56mm naTo, 7.62x39mm or .300 Blackout. use only ammunition of the caliber for
which your firearm is chambered.