SPECIFICATIONS BUILD:NYLON POLYMER COMPATIBILITY: LOW-MID CAPACITY MAGAZINES Colors: Black, Red, Blue, or Clear MANUFACTURER: SENTINAL GEARS FEATURES NO HASSLE EASY-POUR BB COMPARTMENT QUICK FILL CRANK WHEEL OPERATES EFFORTLESSLY (NO BATTERIES REQUIRED) WORKS WELL WITH LOW AND MID CAPACITY MAGAZINES DURABLE NYLON POLYMER CONSTRUCTION RESISTS DAMAGE ERGONOMIC GRIP ADDS STABILITY WHILE RELOADING