An example grip safety interlock can include a lower receiver with a trigger assembly, a safety selector having a detent channel, a grip having an internal recess, an extended detent pin having a detent point and an interference abutment surface, a grip safety lever having an interference ledge, and a lever bias spring positioned within the grip, extending between the grip and the grip safety lever. The grip safety lever can be positioned to pivot within the internal recess of the grip, and the extended detent pin can extend within the grip such that the detent point contacts the detent channel of the safety selector. The lever bias spring can push the grip safety lever to a first pivot position such that the interference ledge of the grip safety lever abuts the interference abutment surface of the extended detent pin to prevent movement and rotation of the safety selector.