The majority of issue survival knives world wide are simple high carbon drop or spear points with slab scales. The better ones are flat ground to process food, which is the #1 item they process. Often the 4-5" range are most common.
Some swedge grind the blades with a low profile - a pattern related to manufacturing economy and the competitive environment of government bidding, along with blade thickness - which tends to be thinner rather than thicker. It also reduces costs while making the edge easier to create.
In America there is a myth that other patterns are preferred and used, but when researching the actual pioneers who developed the country from coast to coast, up to the time when more urban travelers repopularized living in the wilderness, the simple knife has predominated.
Of some interest at that time - the early 1900's - was the knife manufactured with a depressed area down the length of the blade, specifically to reduce material used, and which was made by Marbles, then later copied by sundry other makers. It's another economy introduced during fabrication to trim costs.
Most knives by that time had become standardized around a named blend of steel and carbon ranging from 1060 to 1090 steel. Handle slabs were largely riveted, altho some had innovated a stacked leather washer design which time has proven is maintenance intensive and not known for it's hardiness in wet weather as it contracts and dries, losing it's shape.
To be blunt, the Kabar, a government bid knife, was intended for combat use, with a view toward it being of short service life and barely qualifying as a durable. It's certainly expendable, as many worked there way from government property to personal during a tour of duty. Older ones are notorious for loose grips.
Rust is to be expected on them all. Purchasing one of a stainless alloy, keep in mind, the word was invented for it's literal meaning "stain - less," not Stain Proof. Abuse a stainless knife and it will corrode, too. Proper maintenance is necessary, just as cleaning a firearm is necessary.
That leads to a discussion of how to carry the knife, as a bare blade thrust thru a belt can be dangerous. Many early ideas worked around the simple leather pouch, which became the sewn layered pouch. And like stacked leather grips, leather deteriorates in contact with wet and dry cycles, and wet leather in contact with a blade accelerates rust. In the early days it was expected - metal goods were not often treated at the manufacturing level with any preservative finish, being shipped "in the white." Most firearms were, too, gaining a rust patina from use. Only the most prized and highly maintained kept the original finish - most are now museum specimens or in private collections. Many of the rest of them continued to deteriorate until they became non functional, usually in the hands of the next generation. It was considered a tool, not an heirloom, and like the currency of the day, became worn and even obsolete.
Along the way another generation, most of who never prize their forefathers work, and who always have an eye for fashion they can call their own, look otherwise. Their fathers hand me down, worn tools are rarely considered valuable or of the most modern grade. They are usually considered crude and lacking sophistication - which is not altogether untruthful. Time passes and what we consider the standards of production became passe, even backward.
You still have a dial phone in the house? Nope. Lace up leather boots that go over the calf, a wool belted hunting coat in red buffalo plaid and matching cap with ear flaps turned up in good weather held by a lace?
Very few items we call our own in our lifetime make it to the next generation. The Kabar has, but what did it leave behind which hasn't attracted the publics' fancy? Those which followed the original pattern, of which few are made today. Because they were used, and once worn out, throw in the scrap heap. Much like Model T's.
A 4-5" inch drop or spear point straight blade with slab handles. It was, at one point, as coveted as the Bowie to outdoorsmen. And Marble made them, too. The only problem? They don't appeal to the vanity of men.
Plain simple drop or spear point blade, slab micarta or G10 handles, kydex sheath, done. I bought an ESEE Laser Strike and it's more than enough. I've certainly paid more - Randall #14, Swamp Rat, Nimravus M4 - which I still have - the ESEE does the same. It's a knife. Will my kids give a damn when I am gone? Likely not.