Crimson Trace LG420G Laserguard 5mW Green Laser Sight for Sig P320, M17, M18 (Excl. Subcompact) - 532nM, 50ft Range, Black Finish

The Crimson Trace LG420G Laserguard is a green laser sight purpose-built for the Sig P320, M17, and M18 pistols (full-size and compact frames only). If you carry, compete, or train with any of these platforms, a quality laser sight adds a proven aiming reference that works in low light, around cover, and when your natural point of aim needs a confidence check. This 5mW green laser delivers a visible dot at close to intermediate distances—especially useful indoors or in lower-light conditions where traditional sights alone might slow target acquisition.

The LG420G mounts directly to the trigger guard with no gunsmithing, and the black polymer housing blends seamlessly with your pistol's finish. Green laser wavelength (532nM) is inherently brighter to the human eye than red, giving you faster target recognition in real-world lighting. At 50 feet, you'll have a usable aiming point for defensive, training, or sport shooting scenarios.

Like all Crimson Trace Laserguard models, activation is intuitive—grip the gun naturally and the laser comes on. No additional buttons to fumble, no mode cycling to slow you down. For P320 owners who want a permanent, integrated aiming aid without added bulk or complexity, this is a straightforward choice.

Key Features

• 5mW green laser (532nM wavelength) for superior visibility in dim light
• Designed specifically for Sig P320, M17, and M18 (full-size and compact)
• Grip-activated operation—laser engages when you hold the gun
• Black polymer construction matches modern duty and duty-style pistols
• Effective aiming reference to 50 feet

Specifications

Frequently Asked Questions

Will this laser sight fit my Sig P320 Subcompact?

No—the LG420G is designed for the P320, M17, and M18 in full-size and compact configurations only. Subcompact variants are not compatible.

How does a green laser compare to red for target acquisition?

Green lasers are naturally brighter to the human eye at the same power level, especially in indoor and low-light environments. Many shooters find green faster to locate and track on target.

Does the laser activate automatically when I draw?

Yes—the Laserguard is grip-activated. When your hand closes around the grip, the laser comes on. Release grip pressure and it turns off.

What mounting is required?

The LG420G attaches to the trigger guard with no permanent modifications or gunsmithing needed. Installation is straightforward and reversible.