The Oerlikon was the standard light anti-aircraft weapon used by almost all Allied (and some Axis forces, and remained in service long after the war's end. Employed on Ack-Ack tanks, Landing Craft and other naval craft, this weapon system was close to ubiquitous.
This kit is by Master and provides two exquisitely detailed gun barrel assemblies, each made up of a brass barrel, a collar section, a spring, and an etched brass bracket. It really has to be seen to be believed. Suitable for both 1/76 and 1/72 kits.