Abbreviation Relevant to Gunners

Achilles WW2 self-propelled Anti-Tank gun, in service 1944 – 1950. Based on an American M10 self-propelled mounting, but with the original 76mm gun replaced with the more powerful British 17 Pdr mounted in a turret giving 360o traverse. Ack Assistant (as in OP Ack) derived from the original phonetic alphabet for A. Ack-Ack Anti-Aircraft ................
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