old one
I had an early one, circa 70's I suspect, with the vertically grooved forearm and the plain, conventional front sight, the wood was plain walnut. I always wanted one as a kid, and at about age 35 or so, found the above described rifle at a more than fair price.
I shot the ever lovin' snot out that rifle, a lot of it as fast as I could run it. In a local .22 speed match, I did pretty good on a couple of occassions. I liked the full adult dimensioned stock and long sight radius on the 22"-24" (?) barrel. The tube was a pain to load, I've never liked tubes, but it held a lot of ammo, and made it fun to roll cans repeatedly. The trigger was mushy, but worked at .22 ranges. I never had any trouble with reliability in firing or cycling.
Eventually, though, my early model developed the problem (I suspect) as described by JamesK. The forearm kept splitting at the shot, an "energy pulse" was coming up the op rod and splintering the wood fore grips. After an attempted fix of the original forearm, and replacing same 2x with a new (glossy BDL) , I traded it away.