The rifle is in the DCM sales book as a 30" Heavy Barrel, it still has a 30" barrel with the HB rear portion but the rest was thinned. I'm sure they wouldn't have made it 30" if they were adding a new barrel.
Gary Bush says the sight is a Hart but he can't remember where that info came from but his notes say Hart. The windage part appears to be just force adjustable. The bolt has reversed safety headless cocking piece.
It had a real bad pad on it that I removed while I was cleaning it up as it had lots of grime on the wood.
Dan