My favorite would be my most useful .22. A Ruger 10-22 take down model with a Tac-Sol SB-X 12.375 inch barrel with a 4+inch permanent shroud so you don't need to go SBR.
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The best thing about it is the MagPul backpacker stock with room for 3 loaded mags and a spare battery for the optic and space for a Swiss army knife in the pistol grip.
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And it snaps together in a nice little package.
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