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Grenade 50 Calibre Pre Workout Fat Burners King mass xl is an. 50 Calibre is the ultimate pre workout devastator, designed to take your session to the next level. This hard hitting supplement contains Citrulline Malate, along with beta alanine, caffeine and creatine to increase energy, strength and endurance levels. . 50 Calibre will help to reduce tiredness during workouts and increase workout capacity. Available in three flavours, this powerful pre workout guarantees an explosive workout, helping you to push