I have a 1966 T Bolt.It has a type of alloy,anodised trigger guard,metal trigger and metal mag housing.The front sight is however plastic.A 1969 vintage T bolt should be the same.
One thing to look out for on a 69 vintage is the fact that it most likely has a "saltwood stock"so check very carefully for rust in the area where the barrel,receiver is bedded to the stock.
I took mine to the range just last night,they are fantastic rifles