If I could have only one gun, it would be a .22 semi-auto magazine fed rifle with low power optics, (5) magazines of (10) rounds or less, and a heavy barre.l

If I took a pistol and rifle, it would be the Ruger Government model.22 semi-auto pistol with the 5-3/4" bull barrel, low power optics, (5) magazines, a solid leather holster with a flap style cover, and a laynard attachment, a bolt action .22 rifle with (5) magazines, sling, heavy barrel, low power optics, and a heavy leather or plastic case.

Naturally, I would keep the iron sights just in case something happened to the optics (non-electric)
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Bountyhunter