The Burris FastFire C is an open-emitter micro reflex red dot on the RMSc footprint, sized for sub-compact and micro-compact carry pistols. If your slide is cut for RMSc, this sight mounts directly. It runs an "Always On" 6 MOA red dot with automatic brightness adjustment, so the dot is ready the moment you draw and adjusts to the light around you.
A 6 MOA dot is easy to pick up fast at typical defensive distances. The CR2032 battery loads from the bottom and is rated for about 25,000 hours of "Always On" runtime. The anodized aluminum housing weighs under 1 oz, so it adds very little to a carry gun. Burris part #300239.
Features:
Fit check: the RMSc footprint fits a wide range of carry pistols, but verify your slide is cut for RMSc before you order. After mounting, confirm the screws are snug and zero the dot at the range before you carry.