The OMSX Sight XL Red Dot combines precision targeting with ultra-compact design featuring a 4MOA red dot reticle and innovative GlassShield technology for enhanced durability.OMSX Sight XL Open Mini Reflex Sight4.00 MOA dot size for precise target acquisitionShield/RMSC footprint compatibilityUltra-lightweight 0.38 ounces1.80 inch length compact profileCR2032 battery poweredBlack matte finishGlassShield protection technologyPerfect for concealed carry pistols and compact firearms requiring a low-profile optic solution with reliable performance and easy battery access.