User blog comment:TheKnightOfOyashiro/BF3 expansions announced/@comment-137.30.248.193-20120313200810/@comment-137.30.248.193-20120315162434

For the Thompson, it's in the sense that they are two different models like the M16 and M4 models. The M1928A1 will have the Cutts Compensator, vertical foregrip, 50 round drum magazine, and Lyman rear sight, while the M1A1 will not have the Cutts Compensator, vertical foregrip, 50 round drum magazine, or the same rear sight as the M1928A1. Instead, M1A1 will use the 30 round stick magazine, a simple L-shaped rear sight, and horizontal foregrip just like during WWII. The M1928A1 can also be customized with these options except for the change of rear sights and not removing the Cutts Compensator, while the M1A1 will not be customizable. Both variants will be selective-fire, of course.