Machined from: domestic 6061 t6 extruded aluminum. Finish: matte black. Mounting hardware: hex head screws and wrench provided. Overall length: 5.882". Our winchester 52 mount is made specific to the gun, although it does fit on a kimber 82c, 82g, h&r 12, winchester 75, as well as an anschutz 64 and a remington 37. This mount is available in 0, 20 and negative 20 moa. If your winchester has a tapered barrel (very front of the barrel measures less than750?, you will need a negative 20 moa. The tapered barrel automatically gives you a 20 moa, the negative will bring you back to 0 moa. Please see our faq pages for more information on moa. You will need to remove the barrel blocks in order to install this mount. The mount will then screw into the barrel (screws are provided). Picatinny cross slots run the full length of the rail, which gives the shooter flexibility when mounting scope rings and other accessories. The channel in the center reduces the overall mass of the mount, weighing in at 2-3oz on average. Also, in many cases, it will not obstruct usage of factory iron sights. Egw's one piece scope mounts are the obvious choice for hunters and tactical shooters alike. Add egw's practical or hd scope rings to make it a complete overhaul! available in matte black. Custom silver anodizing is available upon request, at an additional charge of $15 (there is also a 3 month lead time associated with silver anodizing. Please give us a call if you'd like to place a custom order). This mount is a picatinny-style base and compatible with picatinny or weaver scope rings. Installation: egw recommends 20 inch lbs of torque and a drip of blue thread locker (sold separately).