I worked there when I was at Northeastern, I got the job thru the co-op department. They do carry a weapon and have access to shot guns and rifles.
The majority of your time is spent at fixed post through out the building, check ID's, etc. The money was good and there was plenty of OT. All and all,it's a good job if you want to go that route. I worked with a lot of guys who had worked at the Fed for over 15-20 years. They have a good retirement package. Some of the guys I had worked left the Fed to purse a law enforcement career.