Yes, this should fit almost anything with a picatinny rail.
No, this will not fit the Star model 31p.
The CMR-201 will fit the Taurus G3c but it will not fit the Sig Sauer P365.
No, the CMR-206 won't fit the Walther PPK/S 380.
The laser is visible as a dot on a surface. It will not always be a solid beam like in the video.
The Crimson Trace Rail Master Universal Fit Green Laser Sight can work with a Walther PPQ M2.
The Crimson Trace Rail Master Universal Fit Green Laser Sight will need to be adjusted to your firearm and the distance you intend to zero it to. It features both windage and elevation adjustments to zero it to your firearm.
We do not carry a specific holster designed to accommodate this laser with a Glock pistol. We do have universal fit options like the Tacticon Armament Universal Drop Leg Holster (linked below), other than that a custom fitted holster would likely be required.
https://www.opticsplanet.com/tacticon-armament-universal-drop-leg-holster.html
The Crimson Trace Rail Master Universal Fit Green Laser Sight will mount to picatinny rail. So it could be mounted to a CZ Scorpion Evo 3.
Yes, the Crimson Trace Rail Master Universal Fit Green Laser Sight is compatible with the underside accessory rail found on the Glock 44.