Geissele states the Geissele Super Dynamic 3-Gun Trigger is only compatible with Mil-Spec AR15's and not compatible with pistol caliber variants. They do not state whether the Geissele Super Dynamic 3-Gun Trigger will work with an M&P15-22 and if using the trigger with that rifle will void the warranty. I recommend contacting Geissele to confirm compatibility of the Geissele Super Dynamic 3-Gun Trigger and that rifle.
I would recommend reaching out to B&T directly as they state that only some AR15 style triggers will be compatible with the GHM9 but do not specify which. They also state a trigger upgrade will often require modification. B&T should be able to provide you with more information regarding upgrading your trigger.
THe Geissele Super Dynamic 3-Gun Trigger SD-3G can be used in an AR10 platform in .308. It will depend on the AR10 model and whether or not it uses a Mil-Spec dimension trigger.
From what information I could find the Savage MSR 10 uses a standard AR trigger. So the Geissele Super Dynamic 3-Gun Trigger will work in that rifle.
The Geissele Super Dynamic 3-Gun Trigger will not work in a Sig MCX or MPX or PCC's. The Geissele 05658 Super MCX SSA trigger at the link below will work for your Sig MCX.
https://www.opticsplanet.com/geissele-05658-super-mcx-ssa-m4-curved-bow-ar-style-steel-05-658.html
Yes, the Geissele Super Dynamic 3-Gun Trigger will work for either an AR15 or AR10.
No this is for AR-15 platforms.
This trigger's pull weight ranges from 3.0 - 4.0 lbs. (Lighter Spring) to 4.5 - 5.5 lbs. (Heavier Spring) depending on which spring you use. The SSP has a single pull weight range of 3 - 3.75 lbs. The 3-gun trigger is aimed at 3-gun while the SSP is aimed at precision target shooting (where you would be stationary).
Yes it will.
Yes, it comes with the following springs:
3.0 - 4.0 lbs. (Lighter Spring)
4.5 - 5.5 lbs. (Heavier Spring)