5.56mm vs 7.62mm THE CONDITIONS • WEAPONS - 5.56MM LSW F89A1 MINIMI and 7.62mm GSMG MAG58. • AMMUNITION - 5.56mm F1 4B1T LNK and 7.62mm 4B1T LNK. • Firer - One firer only per weapon, fired from the bipod. • Weather - Bright clear day with a slight breeze. • Rounds Fired - After ranging bursts 100rds only was fired at each type of target.