Stay on target with the Osprey Global Green Laser Bullet Drop Compensator. The bullet drop compensator is perfect size for your pistol or rifles when you need a fast effective up close shot with a 3 MOA. The green laser bullet drop compensator comes with a .223 knob (other caliber knobs available separately: .25-06, .243, .308, .270 WIN, .30-06, & 7.62x39). It is shock proof to ensure durability and is backed by Osprey's industry leading no-nonsense lifetime warranty. The compensator is also water proof so you can use it regardless of the weather. With easy installation, you'll be hitting the range in no time!