![1girl alternate_costume antique_firearm bangs belt black_gloves black_hair black_jacket black_sailor_collar black_shirt black_skirt commentary cowboy_shot fate/grand_order fate_(series) firearm firelock gas_mask gloves grey_background gun hair_over_one_eye hat holding holding_gun holding_weapon jacket jacket_on_shoulders long_hair long_skirt marchab_66 matchlock midriff military_hat navel neckerchief oda_nobunaga_(fate) oda_nobunaga_(fate)_(all) oda_uri red_eyes red_neckwear sailor_collar school_uniform serafuku shirt simple_background skirt solo standing straight_hair sukeban weapon rating:s score:15 1girl alternate_costume antique_firearm bangs belt black_gloves black_hair black_jacket black_sailor_collar black_shirt black_skirt commentary cowboy_shot fate/grand_order fate_(series) firearm firelock gas_mask gloves grey_background gun hair_over_one_eye hat holding holding_gun holding_weapon jacket jacket_on_shoulders long_hair long_skirt marchab_66 matchlock midriff military_hat navel neckerchief oda_nobunaga_(fate) oda_nobunaga_(fate)_(all) oda_uri red_eyes red_neckwear sailor_collar school_uniform serafuku shirt simple_background skirt solo standing straight_hair sukeban weapon](/cdn_image/preview/21/97/219776c20fe5f3256a5a3b27c150e979.jpg)
The first firing mechanism or "lock" used in antique firearms. It used an arm that held a burning piece of match cord that would be lowered into a pan of powder that would ignite the firearm. This mechanism could be as simple as an "S" shaped lever called a serpentine that would lower the arm into the pan or it could use a locking mechanism and spring that upon releasing the lock would "snap" the arm rapidly into the pan. The latter type of matchlock were referred to as "snap matchlocks." Most arquebuses, including the Japanese tanegashima, were matchlocks.
This firing mechanism was eventually replaced by the flintlock.
This tag implicates firelock (learn more).