Gobsmacked doesn’t quite express it! » French_infantry_musket_model_1777-MCAH_HIS_91_01-IMG_8104-white
Muskets, in addition to flintlock pistols (above) were typical firearms at the time the 2nd amendment was written, They could hold a single round at a time, and a skilled shooter could hope to get off three or possibly four rounds in a minute of firing.