Remington didn't move any machinery that mattered. They moved some sanders, buffers, and a few pieces of smaller CNC equipment. But they liquidated (mostly scrapped) all of the pantograph equipment, all of the manual equipment, and anything that wasn't tight, shiny, and new.
Remington wanted to make Marlins with CNC, not with mechanical apparatus.
They didn't care about the equipment, they wanted the brand and reputation; and Dunning Krugered it. "How hard can it be. Everything is easy with CNC."
After having so many issues trying to get a CNC'd Marlin out the door, Remington did rehire several of the previous engineers as consultants in Ilion. But they were only there for a couple months, at the most, before being sent back out the door.
That was partly the engineers' faults, though. Two of them could never come up with suggestions for how to improve the parts with CNC processes. Instead, one of them, in particular, earned a reputation for always defaulting to, "It wasn't designed to be made this way."
(You can find more details about this, and stories of particular situations, on the Marlinowners forums. But it takes a lot of digging. The information is spread throughout hundreds of threads and thousands of posts.)
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I have had many Remlin parts in my hands, as well as at least a dozen rifles.
The very late Marlin production was bad, except for 444s, because the employees didn't give a crap. They were all losing their jobs and had had no offers from Remington to move to Ilion. But it was mostly sloppy assembly problems and shortcuts on fit and finish.
The first few years of Remington production were bad for *all* of the reasons they could be. Heat treat was bad. Dimensions were bad. Materials were wrong. Fit and finish were terrible. Processes were being pushed too quickly. Jigs and fixtures were not designed for perfect part locating and holding *every* time, and operators were cutting parts out of spec - particularly receivers, barrels, and breech bolts. Quality control did not exist, because there was no quality.
They were bad parts, being used to assemble worse rifles -- with over-clocked barrels, dropping barrels, hammered in magazine tubes, crooked sights, and on, and on.
But, by about 2017/2018, they were made fairly well. The remaining issues were finish problems - like sharp edges on the levers, rough checkering, and screws having strange shades of bluing.
By the time it was obvious that Remington was closing down for good, there were only two products still being made. The two products that had the best QC, because they couldn't be cheapened any further without negatively impacting them the way the other 'bread and butter' had been (the Rem 700, in particular).
Those products were:
Marlin 336
Remington 870
The last firearm assembled by Remington was a Marlin 336.
That sentence has a very ironic and spicy bite to it, especially after Remington screwed up Marlins so badly after the buyout. But it is part of the historical record, now.
The 870 assembly cells were shut down about 3 hours before the end of what they did not know at the time was the last shift in the Ilion plant. Marlins were made until the end of the day. Employees were notified later that their presence would not be required the next day.
One of my primary sources in Ilion during the closure was a supervisor in one of the Marlin cells. He got a phone call a little after 3 am, the morning after that final shift, informing him that he was no longer employed. It wasn't much of a surprise, but the timing was filthy.