The Ekins rifle was designed in March 1944 and was called an "attachment for S.M.L.E. Rifle for Automatic Firing" in official papers. It was designed at the No.2 AEME workshop. Numerous schematics were drawn up, but there is no evidence that the Ekins rifle was ever produced in significant numbers, if at all. The Australians had already adopted the Charlton Automatic Rifle in small numbers and so there was no place for the Ekins rifle.
Based on design sketches, it seems the Ekins rifle was nothing more than a Lee-Enfield No.1 Mk.III rifle converted for fully-automatic firing with an outboard gas piston assembly on the right side of the gun. It had a pistol grip attached. In these regards, it was very similar to the Charlton, the Howell and the Rieder.