Don't know if they are new or if Top Gun just got around to carrying them but Top Gun is now selling the adapter for using a full size mag in a sub compact grip module. I got one today and put it on a 21 round mag and it works fine in the sub compact. The improved part is that the adapter fits tight on the mag and so far stays where I put it. The older adapters I have for full size mag in a compact and compact mag in a sub compact all required me to use tape or glue to keep them from moving around. Don't know if they changed all versions to fit tight or just this new one.