Model 28PK – more compact variant of Model 28. Was adopted by Spanish National Police Corps. Star Model 28 – also written as Star M28 – is a 9×19mm semi-automatic pistol produced by Star Bonifacio Echeverria. The Star Model 30, Star Model 31 and their variants are considered part of the same design family as Star Model 28. Star Model 28 is one of the early double-column double action pistols and can be thus identified as a wondernine type of pistol