So the side mounted scope mount, the safety, the front sight and bolt are not native to this rifle? How about the scope mount holes on the receiver? What is modified about the bolt, was it drilled for the Buehler safety and can it be fixed? Can the BAR sight be put back on without the muzzle end of the barrel again or would the barrel be scratched up under the back extension of the sight base? And finally, is it worth what I paid or did NRA Sporter fever get the best of me?