well you have a bad gsr and my m1a scout had to go back to th factory once as well. there's no guarantees you will get a good one but you can always negotiate that type of stuff. can always ask if the seller is willing to let you check it out and have a gunsmith look over it with the option to return for a refund. plus buying off FAL files or somewhere like that you can check a guys post history and see if he compained about the rifle.

what i have learned is that the members on here will lead you right. whatever you decide to buy just run it by one of these guys.