action rifle on the  rooftop during the bank shootout scene. The /A3 model is clearly  distinguishable from its earlier predecessor, the Model of 1903, by  the rear sight placement on the rifle. The Model of 1903 used  tangent sights located on the upper band, in front of the receiver,  whereas the newer, improved variant used a "peep" sight located on  the receiver bridge nearer to the bolt handle. The /A3 variant was a  World War Two (circa 1941) improvement on the older model of 1903.  Coffer should have been seen using a Model 1903, instead of a  1903/A3.