and about 1/4" on a staggered stack of 9mm rounds is about one round most likely. My current dillema is that the new orange followers essentially look the same as the 6906 black followers in my 6906 mags. But a number of folks here have said they can get 13 rds in their 12 rd 6906 mags with the new orange followers. The one I tried was 12 rounds, and maybe room for an extra half. Don't know if the follower legs were bottomed out, or if the spring was bottomed out and stacked solid. Maybe there was a revision change on the springs, and some will work for this, and others not. (I am swapping in the 904/906 9 rd follower into my old 39 and 439 mags to get the extra round, and the 39 magazine has a steel follower, and an oddball spring, so it will need a new 904/906 style spring to work. That's why I think an early vs late production spring may have some part in this)

The height/thickness of the body on the orange followers is maybe 1/4" less than the old 14 rd black 5906 followers, that's for sure.