In 1991 the 5.45 mm rifle came into series production and was introduced into the inventory of the Polish Army as the '5, mm karabinek wz.1988 (kbk wz.88)'; 5.45 officially dropping the R&D-phase codename of Tantal - even though it persevered as the popular name of the firearm.
It is an import the receiver was redone by recreator blanks!