tikka-guy
Member
The carbines could originally be purchased to use Glock, S&W or Beretta mags
I believe you're thinking of the Kel-tecs. My PC4 and all other PC9s and PC4s I've seen take the P-series magazines. My guess is it's probably one of the reasons they didn't do better - the P-series was never really popular in the LE market. There was rumor of a 'conversion kit' to allow them to take glock magazines, but I emailed Ruger a while back and they said no such kit existed.
If they make another carbine, my guess is they'd stick to their SR magazines, since they are high-capacity. Although it's hard to argue with the availability and affordability of glock magazines.