Understanding that as a military use knife most of it’s use will be picking rocks out of your boots and opening MREs there are lots of utility minded Spydercos that would make great knives.
The paramilitary and manix are great options but personally I find their tips abit thin for my liking, particularly the pm2 has a thin tip. You could also look at the Shaman which has the pm2s compression lock but the manix’s more robust leaf shaped blade.
Above b00n recommended the Spyderco Endura sabre grind and I think that is a great option. Vg10 will be more responsive to touch up sharpening jobs in the field and the knife has a much stouter tip.
If you are going to get the Endura you might as well get the waved endura so that way you have some self defense capability in your folding knife. Though it is unlikely you will need it a waved knife is perfect as a weapon retention knife is someone grabs your gun. Just practice using the wave until it becomes second nature. A waved knife opens faster than even an auto knife and has no springs or internal mechanism to break. If you don’t want the knife to wave open as you draw it just put a finger over the spine as you draw it.
Waved Endura
Waving tutorial
I recommend you learn to reverse wave because it puts the knife in a more secure grip as you wave it out of your pocket. Here is a pic of me reverse waving my Spyderco pikal.