These ZKM-456 were supplied with set-triggers. Usually these have two triggers:
-first one if pulled will let go at normal trigger weight.
-second if pulled will set the first trigger so at the sleightess pull it will fire(hair-trigger).
Like so many companies CZUB is oriented in mass sales, since this model probably was'nt popular (lack of public with this type of trigger) but to a rifle fan would be ready to walk on broken glass to get one.
Things to make you drool: A CZ-452 full-stock with one of these set-triggers with express-sights such as on Brno #1.
Winchester was a trendsetter in regards of limited reintroduction of old discontinued models. With the advantages of C.A.D. & C.A.M. the cost of mfgr. an old gun has been lowered to an acceptable level, cost covers the various technicians having to install new data in machining process. Hoping CZ(too conservative)
will jump on this bandwagon eventualy.