When Area 419 set out to make the perfect scope mount, they knew what they needed to make something that was reliable and consistent at a degree you won't find anywhere else on the market, arriving on a process that gets you final-bore matched rings, with raw aluminum internals, for a grip on your optic that is more reliable and more true than anything else made - as well as an incredible amount of robustness without adding unnecessary weight.Like most mounts, these begin as separate parts. Area 419 are making the bases and caps in batches. While many will make these parts, send them to anodize, and then just assemble, Area 419 produces around the extra steps. Once these parts return from anodize, they are fully assembled, placed back into specially produced rail fixtures, with the caps torqued to spec over specially made spacers (to give the rings space to torque down on the optic), and final-bored as sets in our world-class machining centers. Mounts are then brought off the machine in sets, QC'd and packaged, ensuring that you receive a mount that was finished perfectly.KEY FEATURES:CNC Milled in America from American 7075 AluminumRaw aluminum, precision bored scope contact surfaces for maximum gripFinal-bored in sets, and never fully disassembled after boring8-9oz per mount, depending on model, balancing weight management and robustnessMultiple accessory mounting pointsSeparate rail clamping bars for maximum grab on the pic railInset clamping feet, allowing for maximum mounting adjustment and pic rail utilitySteel guide pins between base and caps, aiding in alignmentCustom nitrided stainless hardwarePatent-Pending ultra-rigid and repeatable top accessory attachment - attach an optional Diving Board MountBoard Mount