Made in America, Talley Manufacturing's 2-Piece Sauer Picatinny Rails for models 100/ 101 are machined entirely from high grade 7000 series alloy and protected with a hard-coat anodizing to 65 Rockwell ensuring the craftsmanship of these Picatinny rails last the lifetime of your firearm. These 2-Piece Sauer Picatinny Rails are all designed and manufactured with precision to fit your firearm with the industry's tightest manufacturing tolerances.