Originally Posted by
truckjohn
Yep. JM is the "original" Marlin before the family sold out to Remington.
Before you blame Remington, remember that Marlin was SOLD by the family who owned it, and there were contractual requirements, such as supporting warranty, interchangeability of parts, and maintenance of legacy product lines. That limited design changes. Luckily, the designs were fundamentally pretty good. The downside is that changes and improvements were not well documented, and like much "Legacy" manufacturing everywhere, requires significant experience to make quality parts. Take, for example, Marlin's old screw machines. They could whomp out thousands of parts at blinding speed, but took people with serious know-how to change over and set up properly. A CNC machinist can't just walk up to an old screw machine and get it to make anything good. Remington eventually got rid of most of that stuff and was doing it mostly CNC by the end, but that took a lot of money and time to get right.
Ruger, buying the brand and manufacturing equipment out of Remington's bankruptcy, is not bound by any of this. They aren't required to keep Remington or JM Marlins going or make parts for legacy guns. On the one hand, that's a shame for those of us who own them. On the other hand, it frees Ruger to make improvements that needed to be made, but often results in non-interchangability. Such as designing the parts to run correctly AFTER being deburred or post-polished. Marlin parts weren't designed that way. They were designed to come off the screw machine and go into the rifle, roughness and burrs included.
As an aside, I've got an early 1948 336RC and a 1949 336A. The insides on both are rough as a cob and sharp enough to draw blood, but they run flawlessly. The bigger problem is when some ignorant but well meaning soul "Slicks up the actions," fully deburring and polishing them, and they jam like crazy. Won't run, won't headspace, etc. Unfortunately, the factory isn't around to sell us a pile of replacement parts to undo the damage done by some previous owner.
So... There is good and bad. HOPEFULLY, Ruger will allow the aftermarket to support legacy JM and Remington Marlins. Now that there's no factory support for the MILLIONS of rifles produced, we can get some of the secondary market parts manufacturers interested.
I'm looking forward to the new chapter,