As long as you choose one of the AR-10 models then yes it will work.
This only comes in one size for AR-15.
According to the manufacturers website, none of the Radian Weapons Raptor Ambidextrous Charging Handles are compatible with the Sig 716 unfortunately. However, the charging handle you can find by clicking the link below will work for a Sig 716.
https://www.opticsplanet.com/phase-5-weapon-systems-inc-ambi-battle-latch-charging-handle-assembly-308-cal.html
It's slightly lighter, But you can't really tell. I have the Magpul CTR Stock and the Magpul MOE + in FDE and it blends in quite well!
The Spear LT is compatible with MCX pattern charging handles. You would need the Radian Weapons Raptor LT Charging Handle for the MCX which can be found linked below:
https://www.opticsplanet.com/radian-weapons-radian-raptor-lt-charging-handle-black-for-sig-mpx-ambi.html?_iv_code=RDW-CON-RDMCX-R0364
Yes, any of the AR-15 model Radian Weapons Raptor Ambidextrous Charging Handle's will be compatible with the Sig M400.
These Radian Weapons Raptor Ambidextrous Charging Handles will not fit the Sig MPX. You will need the model at the link below.
https://www.opticsplanet.com/radian-weapons-radian-raptor-lt-charging-handle-black-for-sig-mpx-ambi.html
The Radian Weapons Raptor Ambidextrous Charging Handle design allows it to have smooth operation from either your strong or support side. The Radian Weapons Raptor Ambidextrous Charging Handle is Mil-Spec dimensions.
Yes, the AR15 model Radian Weapons Raptor Ambidextrous Charging Handles will be compatible with your LWRC SPR rifle.
No, you will need to use an MCX specific charging handle, like the Radian Weapons Raptor LT Charging Handle for the MCX, found by using the link below:
https://www.opticsplanet.com/radian-weapons-radian-raptor-lt-charging-handle-black-for-sig-mpx-ambi.html?_iv_code=RDW-CGH-RDMCX-R0364&_iv_gun-model=sig-sauer-mcx-1