The information I've seen points to the shorter instalation across the front of the carrier behind the bulkhead, in which case it would be a No22 carrier? Or did MK2's sometimes fit the longer instalation on the track guard?
I guess the No22 is the same as No21 but with the bit where the PSU sits, deleted? The PSU then sits on its side in two angle brackets and clamp down webbing.
Ron
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