Complex sentence: Introduced in 1983, it's a double-action weapon about twice as wide, and substantially heavier than the typical.25 automatic pistol, though its relatively compact size, a powerful cartridge made it an effective defensive weapon or a police backup gun.
Split into simpler sentences: Introduced in 1983, it's a double-action weapon about twice as wide, and substantially heavier than the typical.25 automatic pistol. Athough its relatively compact size, a powerful cartridge made it an effective defensive weapon or a police backup gun.