LG-637 Lasergrips® are a rear-activated laser sight for GLOCK Full-Size pistols (Third Generation 17, 17L, 22, 24, 31, 34, 35, 37, Gen4 17, 22, 31, 34, 35, 37 and Gen5 17, 19X, 45). Featuring Crimson Trace’s famed Instinctive Activation™, which allows the laser to be activated with a normal firing grip, the LG-637 includes a Master On/Off Switch for completely powering down the unit. User-installed in moments by attaching securely to the gun frame, this laser sight is fully adjustable for windage and elevation. Provides 4 hours of run time with (2) included 2032 Lithium Batteries.
| User Guide |
Notice for California consumers:
⚠ Warning: Cancer and Reproductive Harm – www.P65Warnings.ca.gov
Specs
- Activation Location Rear Activation
- Activation Type Instinctive Activation
- Attachment Grip Attachment
- Beam Intensity 5mW peak, 633nm, Class 3R red laser
- Dot Size Approx. 0.50″ at 50′
Fit Notes
Fits GLOCK Third Generation 17/17L/22/24/31/34/35/37, Gen4 17/22/31/34/35/37 and Gen 5 17, 19X, 45:
Instinctive Activation
Exclusive to Crimson Trace products, the LG-637 features a front Instinctive Activation button for immediate laser deployment
Powerful Red Laser
This product features a powerful 5mW red laser – the brightest allowed by law – for an immediate, decisive advantage
Windage & Elevation Adjustments
The LG-637 is factory sighted at 50′ but is completely user-adjustable for windage and elevation with supplied tool


