History QF 13-pounder 6 cwt AA gun
on mk mount, on daimler mk 3 lorry
this standard qf 13 pounder field gun barrel , breech addition of retaining catch breech retain round when loading @ high angles.
it first approved in october 1914 , issued on mk i high angle mounting, mounted on motor lorry. mk i mounting had additional recuperator housing mounted directly above normal recuperator facilitate gun runout @ high angles. hence appearance of gun barrel 2 shorter tubes of similar diameter above it.
mk ii mount improved usability, added deflection gear , recoil system improved additional recuperator became unnecessary , removed. on mk ii mount gun has appearance of standard 13 pounder.
the mount design unusual in having both gunlayers on left side.
following world war i, guns returned service standard 13 pounder field guns.
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