Yes, this comes with the mounting hardware.
Yes, the mounting hardware is included.
Get a swivel to picatinny adapter then get the picatinny version.
The Magpul Industries The Magpul Bipod for M-LOK will fit that stock.
Magpul Industries states their Magpul Bipod for M-LOK features leg extensions that slide and lock with the push of a button on any of the seven half-inch spaced locking detents. The legs extend 3.5 inches, from 6.8” to 10.3”. An industry-exclusive 50° of total tilt and 40° of total pan are controlled by a glove-friendly knurled tool-less bipod locking knob located between the extended legs. Magpul does not provide a specific height to center likely because it can vary based on the firearm you are using. You can contact them directly for more information.
The Magpul Bipod is offered with a picatinny/1913 mount and can be found by using the link below:
https://www.opticsplanet.com/magpul-industries-the-magpul-bipod-for-1913-picatinny-rail.html
These Magpul Industries The Magpul Bipods mount to MLOK rail so they will not mount to the swivel stud on the Savage 110 Tactical. However, the Magpul Industries Sling Stud QD Bipod at the link below will work with that rifle.
https://www.opticsplanet.com/magpul-industries-sling-stud-qd-bipod.html
The Magpul Industries The Magpul Bipod for M-LOK mounts to MLOK rails and handguards. So yes it will work with the Sig M400 series of AR's.
The Magpul Industries The Magpul Bipod for M-LOK mounts to MLOK handguards. So if you have a model of the Smith and Wesson M&P15 that has an MLOK compatible handguard the Magpul Industries The Magpul Bipod for M-LOK will work.
You will be able to rest your rifle on a level surface without it falling over using the Magpul Industries The Magpul Bipod for M-LOK.