The SIG SAUER OPMOD ROMEO7S 1x22mm Compact Red Dot Sight includes a picatinny mount that is not compatible with Weaver style rails.
The SIG SAUER OPMOD ROMEO7S 1x22mm Compact Red Dot Sights FDE finish will be similar to the Magpul FDE. However, being an exact match between the to FDE finishes cannot be guaranteed.
I recommend contacting Sig Sauer in regard to where the parts of the ROMEO7S 1x22mm Compact Reflex Red Dot Sight are manufacturer and assembled.
The SIG SAUER OPMOD ROMEO7S 1x22mm Compact Reflex Red Dot Sight comes with a picatinny mount that sets your centerline height at 1.41" as well as a spacer that will move the centerline height to 1.63". However, this optic also uses the Aimpoint T1/H1 footprint and will be compatible with any aftermarket Aimpoint mount.
The SIG SAUER OPMOD ROMEO7S 1x22mm Compact Reflex Red Dot Sight is powered by a single AAA battery and includes 1 in the box.
Yes. The SIG SAUER OPMOD ROMEO7S 1x22mm Compact Reflex Red Dot Sight will be compatible with any rifle that has a flattop picatinny rail to mount the optic to.
The SIG SAUER OPMOD ROMEO7S 1x22mm Compact Reflex Red Dot Sight will work on an AR chambered in 450 Bushmaster.
The SIG SAUER OPMOD ROMEO7S 1x22mm Compact Red Dot Sight is not compatible with your P320. If you P320 is optics ready, you will be able to fit optics with the DeltaPoint footprint like the Leupold Deltapoint Pro, Sig Romeo 1 Pro, Sig Romeo Zero Pro, and Eotech EFLX.
The SIG SAUER OPMOD ROMEO7S 1x22mm Compact Red Dot Sight does have the Sig MOTAC feature.
The SIG SAUER OPMOD ROMEO7S 1x22mm Compact Red Dot Sights have 9 brightness settings.