SA703 - 75mm single slot tethering bracket - Milspec Anchors
Gibraltar M12 x 1.75, 75mm Thread Length, 12mm Slot Width, Black Oxide, Steel T Slot Bolt 125mm Length Under Head, Grade 10.9, 18mm Head Width x 7mm Head Height - Walmart.com
VMP 3" / 75 mm ID Blow-Through Slot-Style MAF Housing