I work for a small department and we have to buy our own rifles if we wish to carry one. This being the case, my plan is to go with an AR pistol utilizing the SBA3 adjustable brace. Since I'm buying my own rifle, I prefer to do a pistol so I don't have to deal with the hassle of making it an SBR and all that comes with that. My question is, is there any reason that simply the fact that it is a pistol make it unsuitable for duty use? I will be using my 11.5 complete upper from BCM.