Ultimate Arms Gear Tactical Marlin Rifle Deluxe Weaver Picatinny Rail Scope Sight Mount + Tactical 4x32 Red/Green P4 Rangefinder Reticle Scope With Top Fiber Optic Sight - Includes Lithium Battery + Lens Cleaning Kit - Combo Combination Package Kit Set Ultimate Arms Gear Marlin Rail Aircraft Grade Aluminum Alloy Mount with a Black Anodized Finish. Length: 4.73" . Complete with Screws & Allen Key for Mounting. Made to fit : Marlin 9, 45, 30AS, 30AW,36, 62, 93, 336, 336C, 375 & 444, 1993, 1894, 1895 Cowboy , Glenfield 30, Zane Grey & Camp-9 Carbine Marlin 922M & 989, Mossberg 640,Western Field 740. Easy to Install, Will Line Up with the Holes on your Rifle - If You Do Not Have the Predrilled Holes You Will Need to Get Your Rifle Tapped. Provides A Industry Standard 7/8" Weaver / Picatinny Tactical Rail for Attaching Accessories Such As Scopes, Sights, Optics, Flashlights, Scope Rings Etc. Black Anodized Aircraft Grade Aluminum. Accepts All Standard Weaver / Picatinny 1913 Accessories. Bolts Directly to Pre-Drilled and Tapped Flat Top Receiver. Magnification 4X Fixed , Objective Diameter - 32mm. Illuminated Red-Green P4 Rangefinder Glass Etched Reticle - 11 different settings (5 red, 5 green, 1 black).Equipped With State Of The Art Fiber Optic Sight For Incredibly Rapid and Accurate Acquisition. Includes 2 Short Slot Tactical Weaver/Picatinny Rails(1 On Each Side) For Attatching Light, Laser, etc. 100% Shock and Recoil Resistant, Nitrogen Filled, Shockproof, Fogproof, and Water Resistant.