we how have 2 types of  short followers.
 the mossberg, which at this tiem we are only doing in green 
And the type 3 remington short follower.
Mossberg follower is .900 to .903 and the remington is .908 to .910
The reason for the short remington follower is, we have a bunch of 8 to 10 inch 870 copies up here made by Hawk from PRC and  of course the follower is crap, but  the gun has the new style remington retainer.
 if you remove that and install a police style/ wingmaster ball bearing dedent  and a new short follower you can get an extra round in the mag tube 
 
 
As well, as much as we know the followers with the tail on the back is a better idea, many customers still ask us for a cup style follower, so we made them!!
The mossberg follower is mainily for our 590a1 +2 which only just about has enough room to get the 2nd round in so we need a short follower