The Weaver Multi-Slot Base provides a rail for mounting an optic to your rifle. With this scope base, installation is simple and only requires a screwdriver for the included mounting hardware; no specialty wrenches or alignment tools are necessary for proper installation. The no frills Multi-Slot Base is a simple mounting solution for many popular red dots and is compatible with both all Weaver Top Mount scope rings which are sold separately and readily available. Constructed from lightweight, tough aluminum, and withstand the most powerful recoil.