Do you F-class rules guys think something like this would be legal? My father-in-law has some severe scarring in his right eye and can't see the crosshairs anymore. He has been considering trying to shoot right handed using his left eye, but doesn't feel to comfortable about it.
http://www.budsgunshop.com/catalog/product_info.php/cPath/99_807/products_id/88279/ISCOPE+IS9933+ISCOPE+IPHONE+5+BLK
http://www.budsgunshop.com/catalog/product_info.php/cPath/99_807/products_id/88279/ISCOPE+IS9933+ISCOPE+IPHONE+5+BLK