Nambu Type 14 Pistol

[sheepherder]

Originally Posted by zormpas

I was hoping for something like this, the only thing I found was a tiny amount of rust in the grooves where they mate together. Cleaned that up, still tight.

Try brushing the grooves/surfaces with a brass wire brush and see if that helps...If not...

Rather than stone it, I would try some automotive rubbing compound ['coarse'] and/or polishing compound ['fine']...Since yours will come off without a hammer, use the polishing compound...Strip off all the pieces you can, clean the mating surfaces, slather on the compound, move the guard in & out...You'll see it get dirty as it removes metal...Try it for maybe 25 'slides' (you'll probably have to tap it back & forth), then clean it all off, and lube lightly [WD-40 is good here] and see if it slides with finger pressure...Repeat as needed...

Don't use lapping compound/valve grinding compound...They are way too coarse...(But good for removing large amounts of metal)...

...Just my $.02...