The purpose of the police having patrol rifles is one of preparedness. The police are in no way attempting to intimidate those gathered for a peaceful viewing of fireworks. Large gatherings, such as a fireworks crowd, are magnets for a potential active shooter. The news is filled with recent large scale killings: Binghamton, NY; Nickel Mines, PA; Carthage, NC; Northern Illinois University; and Virgina Tech to name a few. If a psychopath with a large capacity weapon were to start shooting fireworks attendees, the police would only have their .40's. Additionally, where the fireworks are in Sharon puts officers' cruisers at a good distance, making the retrieval of a weapon locked in a car futile. An active shooter requires Immediate Action Rapid Deployment (IARD) which also requires that a suitable weapon (patrol rifle) be readily available. In a worst case scenario, if an active shooter were to kill a large number of attendees and police as well, the inevitable question would be, "Why weren't the police prepared?". Well, in this case, they were. Don't read too much into this, the patrol rifle is just another tool of the trade.