??For: For Glock 20 21 20SF and 21SF (GEN 1?3)

??Completely internal: Keep your favorite holster for your For Glock keep your tactical lights or your favorite grips.

??Extremely rugged: The LaserMax Guide Rod Laser for For Glock meets or exceeds both Mil-Spec and Homeland Security durability test standards (drop tests blowing sands temperature and humidity extremes salt water fog deep water immersion 20000+ rounds live fire).

??Installation takes minutes: If you can field strip your For Glock you can install your LaserMax Guide Rod Laser sight?no gunsmithing to your For Glock required.

??Hi-Visibility Pulsing Beam: A pulsing laser beam gives effortless awareness of muzzle and transcends language barriers. It can be used outdoors from dusk until dawn or indoors around the clock.

??Alignment: All Guide Rod Lasers come pre-aligned from the factory at 20 yards. It will never come out of alignment and there is no need to re-zero after battery changes.

??Accuracy: As close to the bore of a For Glock as possible positioning allows for the closest and most consistent relationship between your point of aim and point of impact (POA/POI) over all shooting distances.

??Turn it on: Ambidextrous Controlled Activation? in the custom take-down lever that very closely resembles the factory For Glock take-down lever.

??LaserMax Green Guide Rod lasers.
High performance has never come with such a high degree of reliability.