I am working on a side project for my P.D. We currently carry both the S&W 4043 and 4053 DAO's (some guys like a lighter gun, really!). The guns are getting old and replacement parts are getting harder to come by. The surrounding towns all carry the Glock 22. We have mutual aid with the surrounding towns for rapid response, active shooter, backup, etc.......I am looking for any pros or cons on the magazine disconnect safety, hand sizing, and any P.D's that have recently switched from S&W to glock and why. I am dealing with an administration that is slow to accept change so I need a convincing arguement. Any help would be appreciated. Thanks.