I received my red dot sight and then found out the gun came with an allen wrench for the barrel screw but it did not come with an allen wrench for the sight screw. The screw hex head is 3/32 and not 7/32 like the manual says. Which I don't have one. I checked all the wrenches that came with other gun sights and guns but none are that small. I guess a trip to the hardware is in for tomorrow. I really don't understand why they include a rail but no dang allen wrench to remove it.