Monstrum Savage Arms Axis/Edge Rifles Extended Picatinny Rail w/ Level Bubble Includes Both #6 and #8 Screws for Compatibility Across All Generation. The extra length allows for flexibility in optic placement. Optics can be positioned further forward for more comfortable eye relief. Comes with both #6 and #8 screws for compatibility with both older and newer Savage Axis models. The Picatinny rail section installs directly to the factory mounting holes in the Savage Axis via the included set screws. The rail sections are compatible with both Picatinny and Weaver based rings and optics. Extended version is 8 inches in length with 19 rail slots (versus 7 inches or 16 rail slots for the standard version) the rail allows for flexible placement of your optic for optimum eye relief and cheek weld. Comes with Integrated level bubble built into the rear of the rail to check for consistent vertical alignment of your rifle. Crafted from lightweight 6061 grade aluminum. Specifications for Monstrum Savage Arms Axis/Edge Rifles Extended Picatinny Rail w/ Level Bubble: Manufacturer: Monstrum Color: Black Gun Make: Savage Features of Monstrum Savage Arms Axis/Edge Rifles Extended Picatinny Rail w/ Level Bubble Dedicated picatinny rail mount built specifically for Savage Axis rifle platform - 1 inch longer than standard version allowing for more flexible placement of your optic. Integrated level bubble built into the rear of the rail to check for consistent vertical alignment of your rifle. Comes with both #6 and #8 screws for compatibility with both older and newer Savage Axis models. Compatible with Savage Axis Axis 2 and Edge rifle models. Extended version is 8 inches in length with 19 rail slots (versus7 inches or 16 rail slots for the standard version). Package Contents: Monstrum Savage Arms Axis/Edge Rifles Extended Picatinny Rail w/ Level Bubble Monstrum RM146: Savage Arms Axis/Edge Rifles Extended Picatinny Rail w/ Level Bubble Includes Both #6 and #8 Screws for Compatibility Across All Generation Savage Axis Models Black