The GTL 21 is a high-quality product that features a red (visible) laser which can be zeroed for pinpoint accuracy. The laser functions either independently or in conjunction with the Xenon light. Light and laser are manipulated by a centrally placed mode-switch. All this is housed in a high-resistant polymer casing. The mounting mechanism allows the user to attach and detach the light in a few seconds without the need for any tools. A hard polymer storage case, a replacement bulb and an adjustment tool for the laser are included with this GLOCK Tactical light set.