The Holosun Osight S (now just Osight S by sister brand Osight of Olight) is a compact, enclosed red dot sight for concealed carry pistols, featuring an RMSC/407k footprint, a crisp 2 MOA dot/32 MOA circle reticle, and a unique rechargeable system with a magnetic charging hood. It offers shake awake, auto/manual modes, and fits directly onto slides for many popular carry guns like the Glock 43X MOS, providing a clear sight picture and great value compared to some competitors, despite being a newer entry into the red dot market.

Key Features & Specs:

Type: Enclosed Micro Red Dot Sight.
Footprint: Universal RMSC / 407K.
Reticle: 2 MOA Dot & 32 MOA Circle (Red).
Battery: Rechargeable via magnetic charging hood, with status indicator.
Operation: Manual & Auto-sensing modes, Shake Awake.
Body: Aluminum, compact design for carry guns.
Mounting: Direct to slide, comes with various screws for fitment. 

What Users Like:

Clarity: Clear sight window, crisp reticle, less "tunnel vision" than some.
Convenience: Rechargeable system is easy to use; no need to remove optic to swap batteries.
Size: Very compact, ideal for smaller CCW pistols like the G43X.
Value: Competitive pricing and solid performance.
 
Considerations:

It's an emerging brand (Osight) from Olight, so long-term durability is still being tested, though initial reviews are positive.
It's designed for carry optics, not long-range precision.