Being hammerless means that the trigger acts directly on the sear of the valve with no hammer strike. The valve, driven by a piston, is immediately opened by the pressure of the plenum.Not needing a hammer to overcome the resistance of the valve means that there are fewer moving parts, fewer vibrations (which would impact accuracy), more efficiency, and much more power. This action also makes the K1 very reliable, and indexes without issue. Accuracy - Power - Reliability are the direct benefits of this unique action which Huben pioneered.