That would be LME, and I agree that you would probably get more than 1.050 if you are doing a batch < 6 gallons. (I get 1.062 for 5g with promash
The crystal doesn't need mashing, just steeping, but that looks like a very large amount of crystal. Also, the flaked barley does need to be mashed with some base malt. All you will get out of it in that recipe is starch.
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