|The Picatinny rail system is generally the best way to mount a tactical flashlight or laser to an AR. The M3/M6 series, TLR1, TLR2, and many others are designed to attach directly to a Picatinny rail. Most of these have optional, pressure sensitive switches available. Hand-held flashlights, like those from Streamlight and Surefire, can be mounted if an adapter is used. In recent years, there has been an explosion of Picatinny equipped adapters, mounts, and furniture, giving users many mounting options.
||Crimson Trace has a replacement pistol grip with built in laser. It mounts the laser in close alignment with the sights, but does not fit flattop receivers.