L1A3 bayonet.

Knife bayonet for use on the 7.62 mm. NATO caliber L1A1 variant of the FN–FAL assault rifle. This example was made in 1959 at the RSAF, Enfield. It was repacked in 1990 and was never subsequently issued. "9600257" is the NATO stores number for the L1A3 bayonet. The L1A3 introduced the recessed press stud, whereas, the L1A1 had a protruding press stud. Australia used a slight variation, designated L1A2, which has the protruding press stud.