Also seems to be missing a screw in the front band. If the bore is shiny, it's most likely chrome... it has the early "plum-shaped" bolt handle, higher front sight wings, and AA rear sight (missing the wings). It's pretty nice looking. Reproduction Monopods and Action Dust Covers are available. The AA wings can be found also. Have you shot it yet? Ammo is available from Norma or Hornady. If you plan on reloading, brass is available from Graf and Sons or Midway. You'll load it with a .303 British bullet (yes, they used the same bullet).
I'll be shooting one of my T-99s in an upcoming CMP vintage match next month!
"I was home... What happened? What the Hell Happened?" - MM1 Jacob Holman, USS San Pablo