Missing items - Streamlight TLR-1 HL 1000 Lumen LED Tactical Weapon Light Long Gun Kit

I bought this for my glock 17, first off, while changing out the rail key, one of the screws that holds it in place, stripped when I was taking it off, because whoever assembled it put it on so tight that the threads stripped when I had to take it off! Then theres only one cross bolt in the box, which has the large thumb screw that sticks out on the side, it doesn't come with the flat sided one (earless), so now it doesn't even fit my holster because the cross bolt gets in the way!