 The M1923 was intended to rival the M1918 Browning Automatic Rifle (BAR), with which the Army was already satisfied.The Army did not give the Model 1923 much consideration, so it was not adopted.While not a new model in the usual sense of incorporating major changes, in 1926 the Cutts Compensator (a muzzle brake) was offered as an option for the M1921; Thompsons with the compensator were cataloged as No.