The HS407K X2 stands as an open reflex optical sight specifically crafted for subcompact pistol applications. Building upon its predecessor, this model introduces the Lock Mode feature, initially showcased in our 2018 LEM pistol optic models. When activated, Lock Mode secures the buttons, preventing inadvertent adjustments to settings. Noteworthy features include Holosun's Red Super LED offering an impressive 50,000-hour battery life, a precise 6MOA dot, and the innovative Shake Awake technology. Constructed from durable 7075 Aluminum, the housing adopts the Holosun K footprint and accommodates the 1620 battery in a side-mounted tray for convenient replacement. The HS407K X2 seamlessly integrates with P365X/XL and requires an adapter plate for slides with a four-boss interface.