Check the listing for details. Mossberg 500 590 Reflex Red/Green Dot Sight Scope. Color: Black, Condition: New. Listed at 39.85 USD. Magnification: 1X Objective Aperture: 20 mm Click Value @ 100 yds: 1/2 MOA Dot size: 4 MOA Battery: CR2032 Length: 2.25" Weight: 4.5 oz. FEATURESMicro Red Dot Sight, Precision Red and Green dotAircraft grade alumium to withstand constant heavy recoilFog proof and shock-resistant housingNitrogen charged with weather resistant sealsCoated lens provides superior light transmission, resolution and scratch resistanceUnlimited eye relief for quick target acquisitionDual-illuminated (Red, Green) 4 MOA dot reticle with adjustable rheostat for brightness controlIntegrated Weaver / Picatinny 1913 mounting system 2,000 hours of battery life on low settingIncludes protective lens cover ** MOUNT DETAILS Picatinny Weaver Scope Sight Rail Mount For Maverick 88 Shotgun Mossberg 500/590 The picitinny/Weaver Scope Mount is for Mossberg Model 500 and similar Shotguns.Mount has 13 position slots. Comes with allen wrench and 4 screwsGreat way to mount a scope, sight flashlight, lazer or other accessory to your Mossberg.Specifications:Color: BlackMaterial: AluminumSize: 14cm/5.5" Length (13 Slots)Package Includes:1 x 13 Slots Weaver Scope Mount4 x Screws1 x Allen WrenchScrews are for Mossberg 500 manufactured after 1998 only.