The A-Bolt rifle family consists of two main series: the original A-Bolt and the A-Bolt II. While they share many similarities and are considered part of the same design family, they are distinct models. The AB3, sometimes referred to as an A-Bolt, is a new and separate model with its own design. It's important to note that accessories such as bases, rings, magazines, etc., made for the original A-Bolt and A-Bolt II are not compatible with the AB3. Additionally, all three of these designs are entirely separate from the X-Bolt rifle series.