rugerguy211 said:
Until they make a mag adapter for their own "popular" mags, like those that fit in the P89 and original PC9, I won't be interested.
Ruger P-series magazines may be popular on this forum but in reality they are not nearly as common as Glock magazines or even S&W M&P or CZ 75 magazines so Ruger isn't in a rush to make an insert for them. They obviously had to make an insert to use their own current handgun magazines (SR9, Security 9 and American) but even these aren't out there in huge numbers. Glock is the most obvious outside magazine manufacturer to provide for but S&W is reasonably close these days.
As to future calibers, I wonder if the action is large enough to chamber the .45 ACP? If so an insert for 1911 magazines would be a slam-dunk.