GRAYBOE UNIVERSAL MINI CHASSIS FOR REMINGTON 700 LONG ACTION Optional Adjustable Magazine Release Lever: Optional adjustable "paddle style" release lever, available on all models of the UMC, gives you .080" of magazine height adjustment for optimal cartridge feeding. Take AICS Magazines: Fits all AICS magazines, no bottom metal required. Mags click right into the bottom of the UMC. Use standard short AICS mags for short calibers and 3.850" length AICS mags for long actions calibers. Quick Changeout: Anchors into the stock via 2 screws that are provided with each UMC, seating and locking the UMC with your rifle on it, into Mfg: Grayboe