The Sterling Mk 7 “Para-Pistol” is a variation of the Sterling Submachine Guns produced by the Sterling for only 18 months  from 1986 to 1988.

           The Mk7 was originally designed to provide paratroopers and non-infantry personnel, such as vehicle crews, with a compact, automatic backup/ defence weapon.
 
Due to the very  short production life very few were ever made,  this A4 is the Full Military version . 
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         Sterling Armament Company Ltd ceased trading in mid 1988