I'd like to see how you sanded it down. A disc or belt?I bet ya it was from seat belts... My buddy got his yesterday and it looked just like mine. He's bringing it over tomorrow so I can smooth out the grip for him.
Took it out today for a quick shake down. Shot a mix of steel and budget brass cased ammo. The ban area mag that came with it, a gen3 and a brand new Gen 5 mag all ran flawless.
Sights were on at 10 yards. It does have night sights but they have long expired.
Overall a good purchase.