Ultimate Arms Gear Tactical Aircraft Grade Aluminum 7/8" Scope Sight Accessory Rail Mount For Marlin Rifles 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. Length: 4.73" . Aircraft grade aluminum alloy mount with a black anodized finish.