Yes, the Hawke Sport Optics Dovetail 30mm Hight Rifle Scope Ring Mount is compatible with 3/8 dovetail rails, like that found on the Rossi RS22.
No, the Sig Cross uses a Flat Top picatinny rail while this mount will only fit 9-11mm dovetail cuts. I would recommend using the Aero Precision Ultralight 30mm Scope Mount, found by using the link below:
https://www.opticsplanet.com/aero-precision-ultralight-30mm-scope-mount.html
The Hawke Sport Optics 1pc 30mm Match Series 9-11mm Rifle Scope Ring Mount may work for your Mitchell 15/22 model if it has a 9mm-11mm dovetail mount. It would also depend on what scope you are using to determine if the set up would work on that rifle.
Yes. The Hawke Sport Optics 1pc 30mm Match Series 9-11mm Rifle Scope Ring Mount will fit a Vortex Strike Eagle 1-6x24 riflescope and will fit any 9-11mm and 3/8 inch rail.
32mm. We have full specs and drawings on our website here https://us.hawkeoptics.com/match-mount-30mm-1-piece-9-11mm-high.html
Length is 120mm. We have full specs and dimensional drawings on our website. https://us.hawkeoptics.com/match-mount-30mm-1-piece-9-11mm-high.html