Originally Posted by
darr3239
P.D.s are controlled by liability issues and thusly control just about everything firearms related in an Officer's life, in addition to many other things.
Many Dept's. allow only one brand name of carbine, such as Colt, and nothing else is authorized, period. They issue the approved weapon and don't want anyone asking questions, screwing up their well laid plans and procedures. If you want to be under a microscope, become a cop.
That being said, if a dept. armorer looks over, and has permission to approve a privately owned upper, then it can be done. But it better fit their mind set. The worst Dept's. for near un-bending policies, are the big ones.