The Troy Rear Folding Battle Sight sits at a 1.4" centerline height, while the Strikefire II uses a lower 1/3 mount. This means the sight will be visible in the lower 1/3 of your optic window.
The Troy Rear Folding Battle Sights will work on a Ruger 556 MPR with a Vortex Strikefire II Red Dot.
The Troy Rear Folding Battle Sight is a rear sight designed to be mounted to picatinny rail at the rear of the upper receiver. So if your upper receiver has picatinny top rail the Troy Rear Folding Battle Sight will work.
Yes, the Troy Rear Folding Battle Sight will mount to the picatinny rail on that AR15. They should not interfere with the AimPoint Red Dot when they are folded down.
Yes, the Meprolight AR15/M16 4 Dot Peep Rear Night Sights can be used on the Troy Rear Folding Battle Sight.
The Troy Rear Folding Battle Sight will work with that application.
Yes, this should be compatible.
According to Troy: No tools are required for adjustment of the Troy Rear Folding Battle Sight, each click on it equals .50 MOA of adjustment.
These are AR height sights. It is around 1.4 inches tall which means it will only work or allow for a co-witness with a high height red dot meant to be mounted to an AR.
This Troy rear sight will work with any standard AR-15 front sight including the Troy front Battle Sights as long as they are NOT the Micro's.