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Training devices MECAR SA produces a special subcalibre training device for use with the 90 mm Cockerill Mk II and III
guns, known as the TD-20-90 M640. It consists of a one-piece training device resembling a complete 90 mm round with a 20 mm
12-groove right-hand twist barrel running along the centre length of the device. A special 20 mm Target Practice round, the
TP-20-90 M634, is hand loaded into a breech in the base of the device which is loaded and fired as if it were a conventional piece
of 90 mm ammunition. The 20 mm projectile can be fired to normal combat ranges.
The TP-20-90 round is 185 mm long and weighs 190 g. It has a tracer which burns for 4 seconds.
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