@ T-Bone
It is a Thompson Center R55 Benchmark.
@ Odin
Good job, you guessed it right. I knew you were a milsurp kind of guy. Like I told the guy who owns the Garand, "it don't mean a thing if it ain't got that ping."
His Garand is a 1942 model and it has seen action in WW2. It was rebarrelled in the 50s but the reciever is original. Who knows what stories that rifle could tell...