EGW recommends measuring the hole spacing in your receiver to confirm it matches with the dimensions they have published. 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. Also, in many cases, it will not obstruct usage of factory iron sights. EGW one-piece scope mounts are the obvious choice for hunters and tactical shooters alike. EGW machines these in our shop using one of their machining centers. After machining, the mounts are tumbled, sand blasted, and Type III anodized for long lasting durability. Installation: We Mfg: Egw