Burris optics are made in Greeley, Colorado.
I would recommend contacting Burris directly for more specific information as they do not provide the specific size Allen wrench included with the optic.
There is not a lower mount for the OpticsPlanet Exclusive Burris AR-332 3x32mm Ballistic CQ Reticle Prismatic Red Dot Sight.
Burris does not provide the battery life for their AR-332 3x32mm Ballistic CQ Reticle Prismatic Red Dot Sight, I'd recommend reaching out to them directly for more information.
Yes, the OpticsPlanet Exclusive Burris AR-332 Prism will work in conjunction with your Mini-14.
Yes, the OpticsPlanet Exclusive Burris AR-332 can be paired with a 450 Bushmaster AR and function as intended.
Yes, the OpticsPlanet Exclusive Burris AR-332 will function as intended paired with a 12-gauge shotgun.
The OpticsPlanet Exclusive Burris AR-332 Prism 3x32mm Ballistic CQ Reticle Red Dot Sight weighs 14.2 oz.
You would need to purchase and install a picatinny rail, like the SADLAK BM-59 Scope Mount in order to install this optic. If you do not have a picatinny flattop rail, you cannot install this optic. Since this is a prism sight it will require you to have it mounted above the charging handle (due to eye relief) and possibly limiting your use of 8 round clips.
https://www.opticsplanet.com/sadlak-bm59-scope-mount.html
THe OpticsPlanet Exclusive Burris AR-332 3x32mm Ballistic CQ Reticle Prismatic Red Dot Sight mounts to picatinny rail and should mount to a picatinny rail on that rifle. However, I recommend using the AK47 side mount at the link below.
https://www.opticsplanet.com/midwest-industries-ak-railed-scope-mount-6-75-rail-matte-black-mi-ak-sm.html