If anyone has the time I could use some help. I just purchased a pair of Knights armament RIS carbine handguards. the bottom piece is broken and I am attempting to fix it ( I purchased them this way at a discount). the tab on the rear side is broken off. If I could get some closeups with a ruler for reference this will help me repair them. Also a picture of the set in general will help me asses th condition. Thanks for any help you can give.