What Auto is least likely to rust?

Any of the pistols made with a stainless alloy will be more "rust resistant". None of them are rust proof. This gets beat up on the net a lot and has been since they started using stainless alloys. Many found out the hard way that these guns are NOT rust proof.
The one big advantage to stainless is if it's neglected and starts to rust it's normally far easier to deal with. One thing that will work a LOT is storing the gun in something with a good desiccant in with it. They are fairly cheap and many of them now you can just plug into an outlet to recharge.

"Why a De Lorean of course". Nice........ The gun that is least likely to rust is the gun that is carefully maintained with a thin layer of oil on it. If you don't keep it oiled - it WILL rust. Leaving it unattended is the issue - not the steel.

Find yourself a cheap gun that’s already rusted and don’t worry about it

Oil it and put it in a zip lock bag.

Any of the modern handguns with the nitride finishes aka tenifer/melonite.
You can sweat on it, pee on em', whatever you want. They generally hold up well

Robar

In keeping with the DeLorean theme, one of these:



A stainless Wildey Survivor in 475 Wildey Magnum

SIG-Sauer Mk-25 (P-226 Navy)...

All handguns will rust or corrode if stored improperly.

Id take a Glock anyday for rust resistance. Plenty of people being stupid and sinking them in water for months and calling it a torture test online. An older glock. I hear the new ones have a bit different finish. I have an old 27 thats had minimal care and looks great. I also have a 20 thats been hunting/ fishing/ caving/salt water marshes/in the ocean....and it still looks great.

My HK pistols supposedly have the important parts coated to be resistant. But the slide themselves is easier to scratch than the Glock.

Those two IMHO are in a different class all together from most others.

As far as sig, I don't own a mk-25 and it would make sense for it to be a bit better. But I own several 22x guns, one legion, and a 320. The finish isn't great. They all scratch if you look at them (especialy the legion )very mean like. Doesn't mean they will/wont rust though. None have any rust but I do take care of them. I do know ive had sig and Beretta mags rust pretty bad where a Glock or USP mag wouldn't

entropy said:

DeLorean of course

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or an old galvanized Fairlane. My uncle had a DeLorean, may still have it IDK. NOT an impressive car.....sexy doors. But not a good car

From personal experience, I can tell you that XDs, Glocks, and M&Ps don't rust when left in high humidity, high temperature environments for an extended time.

Here's a pic of a Colt Stainless frame that someone left the rubber grips on way too long before looking. As mentioned so much for stainless being rust proof. IMHO, a Glock would come close to be the one you can store away and forget but not totally of course.

ojibweindian said:

From personal experience, I can tell you that XDs, Glocks, and M&Ps don't rust when left in high humidity, high temperature environments for an extended time.

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My wife son has a smith MP40 that was a case queen. Rarely shot and after about six or seven months of sitting in the factory box it had pitting spots on three or four areas. I soaked it and scrubbed it to stop the rusting but explained that without desiccant and occasional oiling this would worsen quickly.

Nothing will trump correct care, oiling, and humid free storage

Hi-point . it's like plastic coated zinc or something. Plus no one would be tempted to walk off with it.

Obturation said:

t's like plastic coated zinc or something.

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Along those lines the Five seven might do well. Most of the metal is covered with plastic and the rest is coated. Polymer mags too

A pistol that has been treated with NP3 will not rust. However, it costs a pretty penny. Look up Wright Armory and Vang Comp for details.

I'd take one of these (Ruger P95 used because discontinued, S&W SD9VE still in production).

5-SHOTS said:

I'd take one of these

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I bought a p97 just like that back in 01ish that was new in box and rusted. Pretty bad back toward the serrations. I cleaned it up and still love that gun.

If you want a seriously water resistant pistol then there are a few made specifically for a salt water environment. It's the springs that take the most abuse. Produced for special forces in particular are the Sig Mk25, HK MK23 and the HK45. Serious guns at a serious price but they are as good as it gets for that purpose.

P5 Guy said:

Early model Saturns and the Pontiac Fiero the tupperware of autos.
Back to topic; the plastic framed firearms will resist oxidation best.

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Well kind of. The underside would rot out like crazy but the visible parts would remain looking good. Actually it was kind of dishonest to the consumer , they assumed the pos would never rust apart and while the shiny side looked good the rest was completely disintegrated. Gross.

Don't forget to look into vci.

Vapor corrosion inhibitor.

It did very well in my tool boxes that saw Temp humidity extremes

P5 Guy said:

Early model Saturns and the Pontiac Fiero the tupperware of autos.
Back to topic; the plastic framed firearms will resist oxidation best.

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It took a long time for AMC Eagles to rust. One sat in my buddies junkyard for ages with faded paint and little to no rust. They were galvanized under the paint.

Back on topic, I have stainless and hard chromed firearms. Even with those finishes, they get wiped down with Ballistol regularly. I like it better than oil for the humid area that I live in. Once it dries, that coating seems to stave off moisture better than any oil. And it actually dries, not a oily film to wipe off prior to handling. Been working for me for over a decade now.

Answer to OP: probably a Kel-Tech, as they're almost all polymer anyway.

Cant you just buy two cheaper guns and switch tham from time to time? Or get some better storage cache, they are not 100% but it will help