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Sub-caliber barrel insert

charley777

Well-Known Member
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Greetings.
Not sure where to post this but as it is made from a cartridge this will do.

At first glance a normal M19 90 x 600R case for the assorted USA 90mm anti-aircraft, anti-tank and AFV guns.
It has been converted into a sub-calibre device to use .22 rimfire ammunition.
The actual barrel and breech parts are missing.

What seems strange to me is the Broad Arrow stamp.
Did the British use any of these American 90mm guns?
 
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