Ultimate Arms Gear Lightweight Aluminum Remington 870 12 Gauge Shotgun & Compatible See Through Saddle Scope Sight Weaver Picatinny Rail Mount + Tactical 4 Reticle Red & Green Dot Open Reflex Sight Mount Attaches To Your 870 Receiver & Secured With Two Locking Screws Included. 4 Seperate Reticles. Thermoplastic Lens Cover Included. Unlimited Eye Relief. Multi-Coated Lens. Black Finish. Windage & Elevation Adjustments.