Impact MK2,3,4 - Complete Loading System - (1) Stud Feeder and (4) Stud Mag Loaders
Important Magazine Note: Be careful to select the correct round counts for each caliber
Fits: FX Impact M2, M3, M4 (see M4 Fitment Notice Below)
M4 Fitment Notice
STUD has received numerous reports indicating that the breech width on some M4 models is not held to the same tight tolerances as earlier FX Impact rifles. Specifically, many units appear to have a slightly wider breech, which can result in a loose or sloppy magazine fit.
All FX Impact models, including the M4, have four shallow holes machined into the barrel-side face of the breech. These are designed to accommodate small rubber balls that help eliminate play and ensure a snug magazine fit.
However, most M4s appear to be shipped with only one of the four rubber balls installed—FX has not provided an official explanation for this.
STUD recommends contacting your FX dealer to request the missing three rubber balls. Once installed in the remaining holes, these will significantly improve the magazine fit and restore proper alignment and stability.
System elminates the need to hand load any pellets into Stud Mag Loaders
Designed to sort and stage Diabolo Style Pellets.
The Feeders WILL NOT sort Slugs 
The Feeders WILL NOT sort "Flat Top" style Pellets