i am looking to trade my Ruger AR 556 magpul sights, . it has had its delta ring replaced from the ruger screw type to a standard mil spec. and has had the ruger front sight replaced with a railed gas block, and strike industries charging handle and magpul stock, grip and triger gaurd other then that its all ruger. shoots fine just a little heavy for my tastes, would rather have something with an m4 profile barrel.