Model DCL120 is designed and developed primarily for the application of .50(12.7mm) Caliber Heavy Machine Guns(HMGs). This high performance Red Dot Reflex Sight is for demanding applications for the armed forces in Air(Helicopters), on Sea(Patrol Boats) and on Land (Armored Vehicles). It is built for speed and this high performance red dot sight will take your shooting ability to the next level. The unique heads-up-display design with extra wide lens provides an unlimited field of view with both eyes open, while eliminating obstruction and tunnel vision common to tube style scopes. Enhance the capability of operator's confidence in the field. http://donginopt.en.ec21.com/pro ... _Heavy_Machine_Guns