An optional removable front grip usable with any firearm having a barrel shroud formed with a row of regularly spaced openings on its underside. Such openings are routinely provided to ventilate the barrel. The invention front grip is hollow and is provided with a set of lugs which engage any three adjacent barrel shroud ventilation openings to thereby accommodate shooters having different arm lengths. One of the lugs is a locking lug which is operated easily by a screwdriver inserted through the hollow grip.