ðə lˈæst fjˈuː ˌeɪtʃkˈeɪ nˈaɪnti wˈʌn z ðæt wɜː dᵻlˈɪvɚd tə ðə jˈuː.ˈɛs. ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi nˈaɪn wɜː blˈɑːkt baɪ kˈʌstəmz ˈæftɚ pɹˈɛzɪdənt dʒˈɔːɹdʒ ˈeɪtʃ. dˈʌbəljˌuː. bˈʊʃ ˈɪʃuːd ɐn ɛɡzˈɛkjuːtˌɪv ˈɔːɹdɚ bˈænɪŋ ðɪ ɪmpoːɹtˈeɪʃən ʌv "nˈɑːnspˈoːɹɾɪŋ" ɹˈaɪfəlz.
The last few HK91s that were delivered to the U.S. in 1989 were blocked by customs after President George H. W. Bush issued an Executive Order banning the importation of "non-sporting" rifles.