Another variant that never saw duty was the T20E2. It was an experimental, gas-operated, selective fire rifle with a slightly longer receiver than the M1 and modified to accept 20-round Browning Automatic Rifle (BAR) magazines. The rifle was machined and tapped on the left side of the receiver for a scope mount, and included the same hardware for mounting a grenade launcher as the M1. The bolt had a hold open device on the rear receiver bridge, as well as a fire selector similar to the M14. Full automatic fire was achieved by a connector assembly which was actuated by the operating rod handle. This, in turn, actuated a sear release or trip which, with the trigger held to the rear, disengaged the sear from the hammer lugs immediately after the bolt was locked. In automatic firing, the cyclic rate of fire was 700 rpm. When the connector assembly was disengaged, the rifle could only be fired semi-automatically and functioned in a manner similar to the M1 rifle. The T20 had an overall length of 48 1/4", a barrel length of 24", and weighed 9.61 lbs. without accessories and 12.5 lbs. with bipod and empty magazine. It was designated as limited procurement in May 1945. Due to the cessation of hostilities with Japan, the number for manufacture was reduced to 100. The project was terminated in March 1948.