Complete Magazine and Loading System - (1) Magazine, (1) Stud Feeder and (4) Stud Mag Loaders Feeder/Loaders - System eliminates the need to hand load any pellets into Stud Mag Loaders. - Designed to sort and stage Diabolo Pellets. - The magazine will NOT properly stage pellets (in the STUD Pocket) with oversized diameters, such as JSB DIABOLO EXACT MONSTER 25.39g, etc. STUD Magazines are designed for standard-diameter pellets/slugs only. - The magazine WILL NOT feed really short slugs like 25g Zans. These slugs do not have enough of the slug main diameter, to feed correctly. - STUD FEEDER WILL NOT sort JSB DIABOLO EXACT MONSTER 25.39g (these are a larger diameter than a standard pellet). - The FEEDER will NOT sort slugs or Flat Top style Pellets. - Magazines will feed pellets or slugs up to 13mm (.512) in length. - The magazine will NOT feed Flat top pellets. Only Diabolo-style pellets or slugs can be used in the magazine. Magazine - Fits the STUD Loader/Feeder system for automatic pellet loading. - Visual Shots Remaining indicator - Magnetic Lid, no twisting of knobs like factory magazine - Large internally driven, custom wound coil spring (no adjustments required) - Rotor rides on (1) class 2RS, roller bearing, allowing glass smooth feeding of rounds. - Works for both right or left-hand shooters. - Fits FX Panthera, Dynamic, and King models.