The Streamlight TLR-2 HL Tactical Illuminator Flashlight with Laser is ideal for use on most firearms with a rail and installs in just a few seconds. This updated model features the new C4 LED technology with 1000 lumens peak output, 20,000 Candela. The light will run for 1.5 hours on 2 CR123A batteries (included). In addition to the light, this model also features a high power laser which will run for up to 45 hours. The body of the TLR-2 HL is constructed of rugged aluminum and is water, shock and dustproof. The laser is protected by chemical resistant polymer housing. The TLR-2 HL is covered by Streamlight's "No Excuses" lifetime warranty. DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.