The Colt Model 1925 Machine Rifle (better known as the R 75), R 75A and R 80 are lightweight American automatic rifles sold under the Colt Monitor name. Essentially an improved version of the Browning Automatic Rifle, the Monitor was essentially the culmination of Colt’s work on improving the BAR after World War I. Sold from 1925 to about 1931, the Monitor was marketed to law enforcement agencies and some militaries, but failed to sell well in either regard.[2] The Monitors are quite similar to the FN Model D, another improved version of the Browning Automatic Rifle and are very similar in concept and improvements