Sentry....To get Gorilla Glue to harden you need to some water....When I repaired Stock it did the same thing so i dampened a Hand towel then squeezed water all over it and then over night it was hard as a Rock. The water reacts to it then it hardens like Rock, but you probably know , it just thought I'd let you know cause it happened to my stock. NICE CARBINE !!!
Frank