The Radian Weapons Talon-GI 45/90 Safety Selector can not be used in place of a 3 position selector.
Yes, the MCX Virtus is compatible with AR15 style selector switches and will be compatible with this Radian Weapons Talon-GI 45/90 Safety Selector.
The Radian Weapons Talon-GI 45/90 Safety Selector will not work with the M&P15-22. Radian Weapons makes a specific Radian Weapons Talon-GI 45/90 Safety Selector for the M&P15-22 but we currently do not have it available.
Yes, the Radian Weapons Talon-GI 45/90 Safety Selector is longer than a Mil-Spec safety selector.
Please email us at techsales@opticsplanet.com regarding your question.
No, it unfortunately cannot be.
We only carry the ambidextrous version.
Yes it will, most ar10s take ar15 fire selectors.