Enjoy optical superiority with Weaver's Tactical Multi-Slot Bases. These Picatinny bases are designed for specific models of firearms and provide an additional 1 inch of forward length for more mounting options. Manufactured from 6061-T6 aluminum and protected by a matte, Type III hard coat anodized finish, these multi-slot bases are compatible with Picatinny or Weaver style rings. Available with 20 MOA cant for extended range optic adjustment as well as standard zero cant. Compatible with Picatinny and Weaver style rings Made in America Aircraft-grade 6061-T6 aluminum with Type-III hard coat anodized finish Provides additional 1-inch of forward length for more mounting options