The EPS-CORE-GR-3 delivers full-size EPS viewing performance in a compact RMSc-footprint optic with a clean 3 MOA red dot built for everyday carry. Its enclosed emitter design protects the optic from dust and debris while automatic brightness adjustment keeps the reticle clear and usable in changing environments. a ' 3 MOA Red Dot Clean, precise aiming point designed for a simple and uncluttered sight picture. a ' Full-Size EPS Viewing Lens Expanded viewing window provides a larger sight picture while maintaining a compact footprint for slim pistols. a ' Enclosed Emitter Design Sealed housing protects the emitter from dust, debris, and moisture for dependable carry performance. a ' Automatic Brightness with Shake Awake Ambient light sensor adjusts reticle brightness while motion activation preserves battery life. a ' Side-Loading CR1620 Battery Battery replacement without removing the optic, with up to 50,000 hours of runtime. a ' Carry-Ready Durability & RMSc Footprint 6061-T6 aluminum housing with IPX8 waterproofing and 5000G vibration resistance, compatible with RMSc footprint slim-slide pistols.