Pre-Training Liquid with D3PA Perfect to use on biceps and triceps, Guns of Steel® Hot Action Pre-Training Liquid is formulated with D3PA, Caffeine, and Arginine.* A powerful surge of heat immediately activates muscle responsiveness, fueling the most intense workouts with an unbelievable blast of power like nothing you’ve ever felt before. Your Pump Will Never Be the Same! Features and Benefits Clinically Researched Ingredients Formulated for Maximum Gains* Outrageous Mind Blowing Pump* Site Specific N.O. Stimulator* The Ultimate Plateau Buster*