Recommend a discreet SBR backpack

I know it’s been discussed before, but I can’t find it. Looking for available options for a super discreet backpack that will fit an SBR. Preferably one that will securely hold a 10.3” Mk18 with stock fully collapsed and 20rd mag inserted. If needed, I can put a law tactical folding adapter on the gun, but I’d prefer not to if I don’t have too. Thank you.

Links to old threads welcome

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The 5.11 M4 series gets the job done without breaking the bank -
I have the older single strap style (sling bag) - newer ones are available in more color choices and feature dual straps. Two sizes so you probably dont need to add the LAW folder. I added the folder so that I could have mine stowed in the bag with the Surefire Mini SOCOM already attached.
Settled on the newer 5.11 M4 shorty 18L bag. Will update when it gets here.

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