The Streamlight TLR-8A Weapon Light and Laser will protrude approx. 0.3" past the end of your slide. However, this shouldn't be a major issue. You may accumulate some carbon on the lens, but you can clean the lens in order to restore the light.
Fitment on all handguns is never a guarantee, however, it should fit and function just fine.
the 69412 comes with the low switch and the 69413 comes with the high switch.
The Streamlight TLR-8A has a battery life (with the CR123A) of 1.5 hours to 10% output level. Laser only: 29 hours.
The Streamlight TLR-8A Weapon Light is compatible with your Glock 19 Gen 5 using the included 1913-1 rail locating key.
Yes. The Streamlight TLR-8A Weapon Light and Laser is compatible with the FNS-40, FiveseveN, 509, and FNX pistols that use an underside accessory/picatinny rail.
The Streamlight TLR-8A Weapon Light and Laser would be compatible with an AR15 as long as you have a picatinny/1913 rail.
The Streamlight TLR-8A Weapon Light and Laser will fit the Sig P322.
The Streamlight TLR-8A Weapon Light and Laser will fit and function as intended on the Glock 45 underside accessory rail.
The Streamlight TLR-8A Weapon Light and Laser will fit a Glock 19.