Sorry to get away from the original choices, but I think the suggestions for a BM710 or 710HS are a good alternative.
The 710 has a more compact handle, more aggressive blade (recurve), stronger tip, superior lock, and is overall more knife for the money than either the Military or AFCK, IMO.
I love the AFCK, but the liner lock and tip-down carry are turn-offs for me, personally. I carried an AFCK daily for about 3 years, and am very familiar with it. It's one of my all-time favorite knives, but the 710 replaced it immediately. Outperforms the AFCK on everything except thin, soft materials.
I have never been impressed with Spyderco's liner locks (though I like Spydies in general, particularly the smaller ones), and do not trust their 440V (heat treat has been inconsistent in my understanding). Also, though lots of people talk about how hard they use their Military, every one, of maybe 6-7, that I have examined that has been used (actually used hard, not as a letter opener) for a year or two has had excessive liner wear and vertical blade play. I've always wanted one, because I like the design and love the blade, but have been totally unimpressed with how they hold up for other people over the long haul. That is just my observation, and is limited to the aforementioned half-dozen or so knives.
My personal experience with both BM and Spyderco has been very good to date, and I've bought 8 BMs (4 since the Axis came out) and 4 Spydies with no problems of my own.
Another vote for the 710, or the 710HS if you're going to work it hard, and think chipping is a concern.
If you have a day or two to spare, do a search on the reviews/testing forum on AFCK or Military. That debate has been hashed over many times, and alot of heated arguments have risen from it, since both knives were very popular "in their time" (still are).