LaserMax Internal Laser Sight

For Glock 20/21

LaserMax's patented design is the only completely internally mounted laser
sight system and can be installed by the user in a matter of minutes. The
sights come permanently aligned from the factory for center-of-mass
accuracy at 20 yards, with the exception of 1911 and shotgun models, which
are user adjustable. They will never drift out of alignment. There is no
need to re-zero after changing batteries

SPECIFICATIONS:
Beam Intensity :635 nm
Dot Size :3/4" @ 25 yds
Power :5mw
Range :20 Yards
Weight :Adds less than 1 ounce
Battery :High capacity silver oxide button battery pack
Color :Blackd to re-zero after changing batteries.