It is dependent upon just what the shooter is looking for in the 9mm carbine. For home/own protection, the 9mm carbine is much simpler to regulate and area correct shots than a pistol. The Computer system Charger will come build to accept 17-spherical Ruger pistol Publications, but includes a conversion https://9mm-suppressors06161.answerblogs.com/40072042/getting-my-deer-slayer-to-work