Picatinny cross slots run the full length of the EGW Browning A-Bolt 12 Gauge Shotgun Rail 43200, which gives the shooter flexibility when mounting scope rings and other accessories. The channel in the center of the Evolution Gun Works Browning A-Bolt Picatinny Shotgun Rail 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. The EGW 12 Gauge Shotgun Rail System is a Picatinny-style base that is compatible with Picatinny or Weaver scope rings. have been machined in EGW's shop using one of our USA-made Fadal machining centers. After machining, the mounts are tumbled, sand blasted, and Type II anodized for long lasting durability. The entire EGW Browning A-Bolt Shotgun Rail and accessories (from the mounting screws and wrench down to the packaging) are made in the USA.