I belive this is a vintage Dinky Toys howitzer barrel. It is 5 1/4" long. It has a spring loaded bar on the top that will retract and turn to the side to lock. This must have fired a plastic shell of some kind. As is. No wheels/carriage. For parts or repair. Peace looks to be in good condition however is missing some paint mainly on the forward half ass picture. Please study the photos. Thanks for looking