Ruger AR556 FDE Model 08509 for sale

I have a Ruger AR 556 Model 08509 unforced and as NIB , furniture is Magpul MOE FDE, receiver and barrel are FDE also. Comes with factory mag and a Pmag. Has flip up rear sight and standard front sight and sight adjustment tool. Asking $600 shipped. My dad bought it and it has just sat in the box. He is 90 and he isn't going to shoot it so asked me to sell it for him. I can not find the manual though

Reduced to $550 shipped and another new polymer mag thrown in

SPF