To find the ideal Nightstick model to fit your handgun, please visit www.nightstick.com/lightfinder
Yes, the TSM-12G fits the Glock 39.
Nightstick has partnered with multiple Holster manufacturers to create custom holsters that are compatible with this Sub-compact Weapon Light as well as other Nightstick weapon lights and lasers. Those manufacturers can be found linked below:
https://clevelandkydex.com/
https://www.exarchyholsters.com/
https://justholsterit.com/
https://www.wrightleatherworks.com/
The Nightstick Sub-compact Weapon Light W/grn Laser will fit a Glock 26 Gen 4.
Yes, this Nightstick Sub-compact Weapon Light W/grn Laser will fit and function as intended on your Glock 33 Gen 4.
No. The Nightstick Sub-compact Weapon Light W/grn Laser is designed to fit Glocks that do not have a lower picatinny rail. I would recommend using the TLR-6 from Streamlight. I will leave a link to the TLR-6 below.
https://www.opticsplanet.com/streamlight-subcompact-gun-mounted-light-w-laser.html?_iv_gun-model=glock-29-gen-4
Yes, the TSM-Series (including the TSM-12G for the G26/27/33) assembles around the trigger guard of these pistols. It doesn't require an accessory rail to mount.
This light would mount similarly to the TLR-6. Ease would be up to the user as it is not difficult but more lengthy a process.