Ram 3.7 inch SP
The Ram 3.7 inch SP project was terminated in June 1943 because it proved unsuitable in an anti-aircraft role (firing platform too cramped, only able to engage targets over a 90o arc, and unstable in action. It performed very well in a direct fire role, but its high silhouette and lack of protection were considered liabilities. It was suggested that a 17-pounder or 3.7 inch AA gun mounted on the Sexton chassis would be a better solution, but alas, aside from some paper studies, this was not followed up.
In early 1943 Canada did design a really low profile 6 pounder SP on a shortened UC chassis. It was just over 4 feet (1.3M) high. The WO turned it down, as was too wide to fit in a Horsa glider, they also deemed unsuitable for use in combined operations as it could only ford up to 30 inches. The 2 man crew was also considered insufficient. None to my knowlege were built.
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