Yes this will fit that model thanks again Fusion Firearms
This is meant to be screwed into the receiver The BAR11W is the weaver rail SKU thanks again Fusion Firearms
Yes it will fit that shotgun Thanks again Fusion Firearms
Yes, the LPA Adjustable Rear Shotgun Sights are compatible with the Benelli M4. As per the manufacturer: This rear Sight works on most Famous brands of Semi-Auto and Pump Shotguns such as Beretta, Benelli, Mossberg, Browning, Winchester, Ithaca etc... with barrel diameters ranging from .819" to .842" for standard shotguns, and .858" to .882" for heavier gauges. Center-to-center mounting hole distance: 1.7".
The LPA Adjustable Rear Shotgun Sights - Screw Down sights might work with a Mossberg 590. However, I recommend contacting the manufacturer to confirm compatibility.
No im sorry it does not it only has the ghost ring style apertures Thanks again Fusion Firearms
Center-to-center mounting hole distance: 1.7in
No I dont believe so you will need a newer taller front sight either the SG2 or SG3 for that model Thanks again Fusion Firearms
Yes this will fit that model you might need to drill and tap a new holes Thanks again Fusion Firearms
It is suggested you use some sort of a front sight for a better sight alignment.