You're going to need some more information to get an accurate idea of what you have there. 22" barrel 99F in 308 is the lightweight rifle, pretty common. Wonderful version to hunt with, pre-drilled for scope mounts, hollowed out buttstock and featherweight barrel with a rear sight boss for lighter weight. Or could be an R with a heavy and wide forearm or an EG with the schnable forearm, both not common.