D29A Red Dot Protection Cap

We all know it: suddenly a BB flies in from somewhere and a crack appears on the collimator. With this protective glass, that's over. Just put it on the front of the collimator, tighten the screw and the collimator is protected. If the protective glass gets damaged, another glass can be replaced. Another advantage is that it can be placed on collimators with a diameter of 28-30 mm. more about product