Sunday, October 28, 2012

MILSIG magazine collar comparsion

I should note that the magazines I am using is an older gen 19 round magazine for both MILSIG and RAP4.     Since the release of the MILSIG Paradigm Pro’s new magazine system, the square head collars, many people have asked the question “What is the difference between the round collars and the square collars?” “How do they operate from each other? Pros and Cons”.

    Throughout the years before the Paradigm Pro square head magazines were introduced it is frequent that people did not really have a clear understanding what the differences are between the RAP4 magazines and the MILSIG magazines. At most people knew they are interchangeable and compatible with each others markers. Thus the question is, what really separates the three magazines in terms of operation mechanics.

    I will start with the new MILSIG Paradigm Pro. The current square head magazines is designed for the Paradigm Pro What is new about the square head collar is the head is constructed from polymer. The only metal parts is collar detent and the spring that holds the detent bar up. The MILSIG square head collar replaces the ball bearing round collar system. There is a bar that runs lengthwise across the farther side of the opening with both ends of the bar protruding out the sides of collar body a little bit. When the magazine is inserted into the magwell; there is a little ramp within that will push the bar down as the magazine is inserted. The balls than are clear to enter the chamber without being hindered by anything.

    In comparison to the round head feedneck collars; the round collars uses 3 ball bearings to hold the balls in place. When the collar is depressed it creates room for the ball bears to “roll back”. With the spring pushing the paintball rounds upwards , the paintballs squeeze through and then is chambered by the bolt. The problem with the ball bearing design is shooting low to mid-grade paintball or paintball that have not been storaged properly. These are the paintballs that are oblong, dimpled or a shape that is not spherical. The problem is non-uniform paintballs get stuck in the ball bearings which leads to either a misfeed or a ball chop. 

    The RAP4 magazine uses 6 ball bearings as opposed to the MILSIG’s 3 ball bearing collar. However, the RAP4 ball bearings are smaller than the MILSIG ball bearings and this leads to problems with smaller paintballs. In my personal experience when storing the magazines upside down (feedneck facing downwards) smaller paintballs in the 0.679 caliber region will roll out past the ball bearings. This is the main difference I have discovered between the MILSIG and the RAP4 round collar feedneck and can lead to problems for some users. The RAP4 has a shorter collar clip and the MILSIG round feed neck has a taller collar clip.

    I hope this helps clear up some confusion between the differences in the magazines. I often hear people wonder what the differences are between the RAP4 and the MILSIG magazines and excluding the internal mechanics, physical differences of the winder and what not, the feedneck ball bearings is the biggest difference.

In the next article I will talk about the MILSIG Paradigm Pro magazine in detail. Stay tuned and thank you for reading!. Visit for more magazine-fed paintball information!

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