A shock activated laser module for simulated shooting transmits a brief laser beam to mark a point of impact. The module includes a housing, an electro-optical member, a stored energy member and a retaining cap securing the electro-optical member and stored energy member in the housing. The laser module housing is selectively attached in combination to any one of a simulated firearm barrel, a simulated firearm gas reservoir, or to an actual firearm for dry-firing practice.