These Crimson Trace Lasergrips fit S&W revolvers and operate using front placement instinctive activation. The smooth black, polymer material provides for snag-free draws and provides ideal grip security for large calibers. The laser activation switch is located in front, making activation "instinctive" when you assume a normal firing grip on the revolver. *Note- fits both round and square butt S&W models 10 thru 29, 48, 53, 56, 57, 58, 64 THRU 68, 242, 329, 396, 520, 547, 581, 586, 610, 617, 624, 625, 627, 629, 648, 657, 686 and 696. Does not fit k frame Scandium revolvers, does not fit with target hammer.
Specifications:

Wavelength	620-670 nm
Dot Size	.50" @ 16.667 yds
Power	5mW
Range	50ft
Weight	<1 oz
Battery	CR2032 Lithium (2)
Laser Color	Red
Firearm Fit	S&W K,L,N Frame Square Butt
Reticle
Power Switch	Pressure Pad
Adjustments	Windage & Elevation
Finish	Black
Mount Type	Grip