I usually have my Benchmade Osborne with me. I like my Wayne Goddard Spyderco better, but the linen micarta is not as durable. The Benchmade is a great knife, and might be the shape you're looking for. It's a reverse tanto. I used to like serations, but I don't think I'd get them again.
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For the field, you can't beat the Swiss Army Rucksack. It's got a locking blade and a nice long saw.
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