I just got my M&P Sport yesterday. A flyer from the sight manufacturer said that you needed a front sight adjustment tool. Was one suppose to come with the rifle?
No, a front sight adjustment tool is not supplied with the Sport. If you read that flyer again, it is for a Magpul front sight and you do not have that on the Sport.
You can purchase a tool if you would like, or you can just use the tip of a FMJ round, or a nail, or small screw driver....you just need something small enough to push that front pin down.