(at around 7 mins) The deputy pops the button on his holster. You can see it is a plastic gun from the mold marks running down the center of the fake gun.
When the Sheriff is talking to the deputy at about 18 minutes or so, I noticed that the rank insignia they wear is not correct for their rank in the department. They are wearing Army rank insignia on their epaulets and the deputy is wearing Corporal rank which is a higher rank than the rank the Sheriff is wearing, which is Private First Class. It should be the other way around since the Sheriff is supposed to be higher in rank. Oops.