Ultimate Arms Gear Titanium Stealth Grey Lightweight Aluminum No Gunsmithing Remington 870 12 Gauge Shotgun See Through Saddle Scope Sight Weaver/Picatinny-Rail, Mount Hard Anodized Fits Remington 12 gauge 870 & Compatibles With 2 Included Locking Bolts That Simply Replace The Original Trigger Pins. Perfectly Contoured To Match Receiver - Low Profile See Through Design To Maintain Original Iron Sight Use. Provides A Standard Top Rail That Is 7/8" 14 Slot See-Thru Designed Weaver - Picatinny Rail For Attaching Scopes, Red Dots, Sights, light, lasers etc. Professionally coated in Titanium Gray Lightweight & Easy To Install, No Gunsmithing.Fits Both Ambi Right-hand and Left-hand Models.