FWIW the thought behind the Recon Series is summer season where cold isn't as critical. I've received a number of reports of the Recon quilts going down to 50-55°. I have also received and confirmed from personal experience the Operator quilts being warm into the 30's. I would make my choice based on the range of temperature you wish to cover and how warm or cold of a sleeper you are.
I understand the SUL mentality as I used to backpack sub 5# myself, but have since decided a good nights sleep is worth a few extra ounces if needed.
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