Modular Optic Procedure (MOS): The MOS design on this pistol is actually a activity-changer. It permits effortless set up of varied pink dot optics, enabling shooters to improve their precision and target acquisition. Complex Knowledge are rounded and do not replicate tolerances – They could be altered all at once! https://microbardispo66665.answerblogs.com/30887400/rumored-buzz-on-glock-17-mos