ðiːz mˈɑːdəlz hæd ðə lˈɑːkɪŋpˈɪn tˈæbz ᵻlˈɪmᵻnˌeɪɾᵻd ɔnðə fɹˈʌnt ˈɛnd ʌvðə ɡɹˈɪp ɐsˈɛmbli, ænd ðə kˌɔːɹɪspˈɑːndɪŋ lˈɑːkɪŋpˈɪn hˈoʊl"pˈʊʃpˈɪn" hˈoʊl ænd bˈʊʃɪŋ æt ðə bˈeɪs ʌvðə ɹᵻsˈiːvɚ hæd ˈeɪ "jˈuː"ʃˈeɪpt pˈiːs ʌv mˈɛɾəl ɪnsˈɜːɾᵻd tə pɹɪvˈɛnt ðɪ ɐtˈætʃmənt əvə fˈʊlˈɔːɾoʊ "sˈɛf" tɹˈɪɡɚ ɡɹˈuːp.
These models had the locking-pin tabs eliminated on the front end of the grip assembly, and the corresponding locking-pin hole ("push-pin" hole) and bushing at the base of the receiver had a "U"-shaped piece of metal inserted to prevent the attachment of a full-auto "SEF" trigger group.