The present invention describes a multi-positional, modular bodily limb splinting system consisting of at least one pair of rigid, shared geometry interlocking male and female splint members which allow for expedient placement and treatment of a limb injury. The male splint member includes a locking post and an adjustable locking post at one end, and the female splint member includes a locking aperture operable to receive and interlock with the locking post and a plurality of adjustable apertures operable to receive and interlock with the adjustable locking post. The male and female splint members of various lengths may be positioned into one or more of several incremental angled configurations of up to 360° to conform to the extremity injury.