The Area 419 Remington 700 Long Action Improved Scope Rail is machined in house on a 4-axis HAAS VMC from 7075 Aluminum. Straight off the mill there is not a single sharp edge left, all corners are radiused and any necessary harsh corners are chamfered. Compatible with #6 and #8 screws, no modification necessary All mating areas are 1:1 surface machined to exact profile of the Remington action for a solid fit Machined to MIL-STD-1913 Ejection port cut blends seamlessly into action and gives plenty of room for top loading ADL style rifles Type III Hardcoat Black anodized (4) 6-48 and (4) 8-40 Torx T10 screws and wrench included All screws ar Mfg: Area 419