Apparatuses and systems for ornamental piercing of body parts are disclosed comprising a main housing having a thumb grip section along a rear surface, a post holder including separate portions held together slidably engaged within a post holder track within the main housing such that the separate portions support a post while held together within the post holder track and fall away to release the post after exiting the post holder track, and a jaw slidably engaged with the main housing with a jaw track. The jaw track is parallel to the post holder track and the jaw supports a backing platform for piercing with the post as the jaw and main housing are moved together along the jaw track. The jaw includes a finger grip section disposed below and opposite the backing platform and opposite the thumb grip section of the main housing.
