The BBR (Browning Bolt Rifle) was made from whenever Browning stopped using the FN and Sako actions (mid 70's??) until the original A-Bolt was introduced about 1985. It has 9 locking lugs like a Weatherby Mark V and a large diameter bolt. The receiver walls are very thick as there are no raceways as the lugs are the same diameter as the bolt. This makes the action quite heavy and rigid. The BBR looks a lot like an A-Bolt with the same tang safety, bolt handle shape, same bolt release,flats on the receiver and removeable mag box attached to the floorplate. The A-Bolt is a 3 lug bolt with a smaller body diameter and other differences.