Check out
http://usriflecal30m1.com/
This site will generate the parts list for your year rifle, just enter your serial number.
Also the Stock should have a stamp of the left side S.A./N.F.R.(with .437 Ordnance Wheel,.
188 Ordnance Wheel on bottom of pistol grip) 81/.81 butt stock holes, 1.75 inch channel, Straight clip latch relief.
Check the year on the Barrel to be sure it's original,
it should look like this

SA = Springfield Armory
3 45 = March 1945
Your stock looks like a Arsenal rebuild stock, Overton most likely.
Very nice rifle anyway, I have a 1943 Winchester and a 1945 Springfield. and yes they should have lockbar sights.
here in my 45 Springfield

"A gun is like a parachute, if you ever need one and don't have one, you'll never need one again"
Calling Illegal Aliens “Undocumented residents” is like calling a Drug Dealers “Unlicensed Pharmacists!”