ɪf ðə mˈʌzəl ɪz nˌɑːt pɹˈɛst ɐɡˈɛnst ɐ sˈɜːfɪs wɪð səfˈɪʃənt fˈoːɹs, ðə fˈaɪɚɹɪŋ pˈɪn ɪz blˈɑːkt ænd kænˈɑːt ɹˈiːtʃ ðə lˈoʊd tə fˈaɪɚɹ ɪt.
If the muzzle is not pressed against a surface with sufficient force, the firing pin is blocked and cannot reach the load to fire it.