I recently acquired my first Browning. It is a shotgun with some characteristics of an A5 3-shot but it is also very different. The story from the family that had it is one of their ancestors used it in the 30's in a sheriff's department in New England. It has markings for a 3-shot on the hand grip but the humpback is missing on the reciever unlike any A5 or 3-shot I have seen or can find online. It also has a cut-off trigger guard which looks ot be factory original. Supposedly this was a model made for law enforcement and the cut-off trigger guard is to allow use with gloves or mittens in cold weather. That sounds reasonable but why would a law enforement use on a 3 shots when they could have 5? any help identifying this would be appreciated. Thanks In Advance!