The Mossberg 940 Turkey Shotgun has a mounting base to accept Shield RMSc footprint red dots. So yes, the Leupold DeltaPoint Pro 2.5 MOA Red Dot Sight can be mounted to that gun.
The Walther PDP F Series will accept a variety of mounting footprints and red dots including the Leupold DeltaPoint Pro 2.5 MOA Red Dot Sight. You will need to order the Leupold DeltaPoint Pro 2.5 MOA Red Dot Sight mounting plate from Walther for your model PDP. All red dots will need a compatible mounting plate from Walther to mount to the PDP series pistols.
To mount an optic on the PPQ Q5 Match, the correct mounting plate is available through Walther Arms Inc. Customer Service. Hit them up and order Leupold Mount Base (04). per the Walther Q5 User Manual, your first optic mount base is complimentary.
The 2.5 moa is a red dot or point. Whereas the 7.5 moa is a triangle, or delta. Although the delta may obscure more of the target, its larger size should make it easier to acquire; for longer, more precise shooting, you can zero it to use the fine top of the triangle at a slight 6 o'clock holdover and have effectively a more precise reticle than any dot.
The FN FNX-45 Tactical should come with the adapter plate you need to mount this on the pistol.
That will depend on what sights you have. If you are running suppressor height sights, you should be able to co-witness them. It will not work with normal height sights.
The Leupold DeltaPoint Pro 1x 2.5 MOA Red Dot Sight will not fit on the Glock 48 MOS.
Yes, the Springfield XD OSP ships with the #XD5072 optic plate which is compatible with optics that use the Deltapoint Pro or RMSc footprint. You will be able to fit this Leupold DeltaPoint Pro Red Dot Sight using that plate included with your pistol.
MOS model Glock pistols will be compatible with the Deltapoint Pro with the #4 adapter plate included with your Glock. The Vortex will require the #1 adapter plate included with your Glock. Email us at Techsales@opticsplanet.com for further assistance.
Yes, the Leupold DeltaPoint Pro Red Dot Sight will be compatible with your Staccato CS. However, you will need to purchase the Dawson Precision Leupold Deltapoint Pro Mounting Kit, which can be found and purchased on the Staccato website (linked below).
https://staccato2011.com/products/dawson-precision-optic-system-tactical-kit-for-leupold-delta-point-pro/