Marlin screwdrivers

Measure the width and depth of the Marlin slots then get corresponding Magna tips from Brownells.

I use the same exact Brownells bits when working on 336s and my 444. Haven’t needed to take apart an 1895 yet.

I would say yes that Marlin 336 drivers will work for an 1895. I wouldn’t trust how somebody else decides what screwdriver fits which screw though. So I would still be leery of the 336 set.

The Brownell’s Magna-Tip set would be the way to go.
If you look in the description section on this page it list what bits come with each set. Pick the set that fits your needs and get it.
https://www.brownells.com/gunsmith-.../magna-tip-sets/magna-tip-sets-prod41571.aspx

I grind my own to fit odd screws, like the very thin-bladed 336 screws.

edwardware said:

I grind my own to fit odd screws, like the very thin-bladed 336 screws.

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I looked but couldn’t find the screwdriver that Brownell’s used to offer that you had to grind the tip. The shafts were long and could be ground several times.

GunnyUSMC said:

. . . couldn’t find the screwdriver that Brownell’s used to offer that you had to grind. . .

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Given who's going to be grinding it, I buy the Chinesium set to whittle on. The learnings hurt less that way.

I'd go with the suggestion involving the Magna-Tip bits from Brownells. I use the sets I have almost daily and I've not buggered up a screw slot, ever. They will sell single bits that will fit any size screw slot that can be found, for slot width and slot length. These bits are heat-treated properly, after they have been shaped properly, so the bits are done very professionally. When grinding on any screwdriver bit, caution must be adhered to, to not remove the temper involved with that particular bit being ground by getting it too hot.