If the front sight has been filed down, you will need to know what weight bullet it was sighted in for. Ruger has a policy that you buy a used Ruger you can send it to them to go over at no cost,(other than shipping). They may fix that front sight, but you might call and ask before the purchase. Revolvers are from their plant back east: 411 Sunapee Street, New Port, NH 03773...Ph 603-865-2442 Best of luck