The front sight, which is an M-16 adjustable-post type, is incorporated over the gas block and is not removable.
ðə fɹˈʌnt sˈaɪt, wˌɪtʃ ɪz ɐn ˈɛm sˈɪkstiːn ɐdʒˈʌstəbəlpˈoʊst tˈaɪp, ɪz ɪŋkˈoːɹpɚɹˌeɪɾᵻd ˌoʊvɚ ðə ɡˈæs blˈɑːk ænd ɪz nˌɑːt ɹᵻmˈuːvəbəl.