Spyder Rapid .50 Cal Loader airsoft magazines the MK18 MOD1 features a

the MK18 MOD1 features a polymer upper / lower receiver as well as a polymer free float rail interface system

The LED will either blink red or green

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Spyder Rapid .50 Cal Loader airsoft magazines the MK18 MOD1 features aThe Rapid . 50 Caliber Electronic Loader is the superior paintball hopper for your . 50 Caliber paintball marker. The Rapid can hold 350 paintballs and operates at a 20 balls per second feed rate. The force feed system insures your paintball marker receives the paintballs just as fast as you can shoot them. The Rapid operates on one 9 Volt battery (sold seperately). Features and Specifications: 350 round paintball capacity 20 ball per second feed rate