Both ruger can use glock mags with the included insert. However the 9 is more reliable than the .40 at least for many users. Extended glock 22 mags on the .40 have a tendency to jam on the last few rounds but the 15's work great. This seems to be a manufacturing issue as many of the .40 work just as well as the 9 on extended mags. If people wonder why you would want a pistol caliber rifle its for stopping power and cheapness of ammo. Haven't seen the numbers on the .40 but the 9 shooting out of a 16" barrel will give it the kinetic energy of a .357 out of a 4" pistol. I would imagine the gains would be even larger for .40.
Does Ruger make one of those in best mm?
9 and 40, das all.
Both ruger can use glock mags with the included insert. However the 9 is more reliable than the .40 at least for many users. Extended glock 22 mags on the .40 have a tendency to jam on the last few rounds but the 15's work great. This seems to be a manufacturing issue as many of the .40 work just as well as the 9 on extended mags. If people wonder why you would want a pistol caliber rifle its for stopping power and cheapness of ammo. Haven't seen the numbers on the .40 but the 9 shooting out of a 16" barrel will give it the kinetic energy of a .357 out of a 4" pistol. I would imagine the gains would be even larger for .40.
After rereading your message, I'd imagine the issue you describe is the opposite issue I've been having, not enough force for the last few.