LaserMax now has a green laser for their guide rods in Glocks. Virtually all models of Glocks will be covered from Gen 1-4. From the press release:

August 16, 2013 (Rochester, NY) – LaserMax® today announced the official debut of the world’s first green Guide Rod Laser™ for GLOCK® Safe Action™ pistols.

“The Guide Rod Laser is the smallest and most robust laser to enter the market,” commented Kurt Worden, LaserMax VP of Commercial Sales. “Now, with the enhanced visibility of green over red paired with native green’s stability over a broad range of temperatures and maximized battery life, there is no better laser sight available today.”

At one with the gun,™ the LaserMax Guide Rod Laser sight system replaces the factory spring guide and recoil spring with a ruggedized laser assembly that incorporates the diode, electronics and battery source. Because it is housed completely within the firearm, installation of the sight does not restrict holster choice or effect grip ergonomics in any way.

Unlike lasers that turn on automatically, a modified slide lock lever serves as LaserMax’s signature Controlled Activation™ switch, allowing the shooter to operate from concealment without risking a potentially dangerous reveal of his or her position. Placement of the laser and switch also reinforce the NRA’s rules for safe handling of firearms and prevent any potential blocking of the beam, which projects from immediately under the bore for the highest accuracy.

The first green Guide Rod models offered will be compatible with GLOCK models 17, 17L, 17 Gen4, 18, 19, 19 Gen4, 20, 20SF, 21, 21SF, 22, 22 Gen4, 23, 24, 31, 32, 34, 35, 37 and 38. Like all LaserMax products, the green Guide Rod Laser will be covered by an industry-leading 5 year warranty. First shipments are expected to hit retail shelves mid to late September at a suggested retail price of $449.
Description:

Greater versatility. Enhanced visibility. Stability over a broad range of temperatures. Now you can have all three in a green laser with the added advantage of it sitting inside the gun. Green Guide Rod lasers from LaserMax. For design, performance, and durability, nothing else comes close.

Get everything. Compromise nothing.

Specifications:

◾ Weight: <1 oz
◾ Power output: < 5 mW
◾ Battery Life: Approx. 1 hr continuous
◾ Alignment: Factory aligned for 20 yards
◾ Warranty: 5 Years