Hammers Marlin Rifle Scope Rail Mount Multiple Ring Slot Picatinny Base 9 336 45 36 62 375 30AW 444 1894 Mossberg 640 63B 48069 Updated design with more Picatinny size ring slots Glossy black anodized finish Includes mounting screws Fits onto Marlin 336 and other rifles as listed below Works with both Picatinny and weaver style rings