sentences:  Spent casings are ejected downward.The weapon has a striker firing mechanism, a trigger assembly for fully automatic only fire and a cross-bolt safety (the "safe" setting disables the bolt catch).The SIG MG 710-3 is fed from the left side by either NATO standard disintegrating M13 (United States) or continuous link German DM1 belt, but only after swapping several parts in the feed block.