Grayboe Universal Mini Chassis System Inlet Long Action Ruger American Black

Overview

The Grayboe Universal Mini Chassis (UMC) System is a black 14-ounce bedding block manufactured from T6 6061 billet aluminum with a cerakote black or hard-coat anodized Type III finish. Designed to drop into Grayboe Flagstaff, Core, and Renegade stocks, the UMC allows shooters to interchange multiple rifle brands and calibers—short or long action—into a single stock. The system anchors securely into the stock using two included screws and fits all AICS magazines without requiring separate bottom metal. It features an optional adjustable "paddle style" release lever providing 0.080 inches of magazine height adjustment for optimized cartridge feeding. Standard short AICS magazines are used for short-action calibers, while 3.850-inch AICS magazines accommodate long-action calibers.

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