Abstract: Provided is a replacement pistol barrel for reliable operation when suppressed and that will universally fit multiple versions of a handgun model.

Abstract: Provided is a pistol striker safety plunger having an axially nonrotatable plunger body configured for installation in a pistol slide to selectively block forward movement of a striker when in a fist position and to allow forward movement when in a lifted position. The body includes a bottom surface configured to interface with a lifting trigger bar and having a beveled forward portion being substantially flat rearward thereof. Alternatively, an adaptable pistol slide kit may be interchangeably operable on pistol frame assemblies of different configurations. The kit includes a slide body with a striker safety plunger socket and a plurality of interchangeable axially nonrotatable striker safety plungers configured to be slidably received in the plunger socket. A first plunger has a bottom surface with beveled forward and rear portions and a second plunger has a bottom surface with a beveled forward portion and substantially flat rearward of the forward bevel.