ðiːz ɑːɹ vˈɛɹi skˈɛɹs bɪkˈʌz mˈoʊst əv ðˌɛm wɜː jˈuːzd æz hˈoʊsts fɔːɹ fˈʊlˈɔːɾoʊ kənvˈɜːʒənz pɹˈaɪɚ tə ðə mˈeɪ nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi sˈɪks məʃˈiːn ɡˈʌn bˈæn.
These are very scarce because most of them were used as hosts for full-auto conversions prior to the May 1986 machine gun ban.