The M73 Picatinny rail forend from SureFire, the tactical technology company™, is a high-quality Picatinny forend for the AR/M4-type carbines that replaces the weapon's stock forend allowing the user to mount a variety of accessories. Machined from military specification hard-anodized aluminum, they're stronger, dissipate heat much better,and provide rock-solid weapon fit. These precision rails enable consistent " repeat zero" of any accurately dimensioned devices attached to them, such as SureFire lasers or WeaponLights.