Fieldmaster/Huntsman are 4 layer. They weigh much less than a typical 4 blade 2 layer (non-SAK) Scout/Camp/Demo knife.
I
suspect the aluminum liners ... and that Cellidor weighs much less than bone/wood/Delrin/Stagalon on the Scout/Camp knives, and whatever stainless (440A?) is used for the scales on the Demo knife, are responsible for the lighter weight.
I have the Huntsman.
(I prefer the multi purpose cork screw over the single purpose #2 Philips.)
It carrys well in the pocket, in a proper size belt sheath, or clipped to a belt loop or SAK belt hanger.
Weight is not significant. As shown with SAK split ring and (genuine stag bead) fob, mine weighs in at just 100.24 grams / 3.535 ounce, according to my digital jewler's scale.
I don't know if the Fieldmaster is a few grains to a full gram heavier "thanks" to the #2 Philips back tool.
I'm fairly certain the #2 weighs slightly more than the cork screw.
View attachment 2606793
At any rate, I highy recommend the Huntsman/Fieldmaster.
If you can do without the multi-purpose "package hook" (BTW: one of the other uses is using it in conjunction with the OEM supplied split ring to hold and stabilize a standard "T" Shank jigsaw blade for tasks the wood saw is not capable of taking on. Thin flat metal, or copper or steel tubing, for example.) the (costlier) Evo Grip 17 (cork screw) or S18 (locking spear point primary and the #2 Philips back tool.) are a viable alternative to the Huntsman/Fieldmaster.
BTW, Both Evo Grips also forego the small pen blade in favor of the fingernail file.

I carried a Ruby Huntsman daily for 20 consecutive years, before it was misplaced or lost duing my move to this Assisted Living, paired with a Buck 110 or Old Timer 6OT/7OT, and a ("large") stockman or Barlow. (and a CS "Heavy Machete" when storm trimming the 87 coconut palms on the vacatoin rental property my former employer had. (a "never ending" job ... like cleaning and raking the beach.) When finished with palm Number 87, Palm number 1 required trimming and dropping the

coconuts b4 they dropped naturally, possibly landing on someone's head.
FACT: More "humans" and other critters are turned off every year by falling coconuts than the combined alligator/saltwater crock, bear, puma/mountain lion, the Everglades Boa's, shark (Tiger, Hammehead, and Bull/Black Tip ... among others located in the Atlantic Ocean, and the Gulf of Mexico), and Hurricane attacks, AND car/motorcycle/Bicycle crashes.

I was at MM 66 (ocean side) on US-1 in the Keys. When the annual traffic deaths on US-1 was 500 or less, the State and Monroe County considered it a "good" year.

I believe the worst year while I was there had over 1500 traffic deaths between Florida City (last city on the mainland heading into the Keys) and Key West.
The weight and the "bulk" of 4 layers never bothered me.
Most used tools are the scissors, saw, cork screw (not for bottle corks) "package hook", punch/reamer/awl, can opener, (tho tbh I much prefer the "safety can opener" of the Scout/Camp/Engineer's/Demo knife) and toothpick.
I (living) inherited my current Huntsman in 2022. The Gent here wanted me to get it (and a couple other SAK's and his Leatherman Charge+ TTI) when he passes, but h (rightly) does
not trust the facility's management and owner to carry out his wishes when he leaves for his next life, somewhere in the multiverses.