10/22 takedown. Do it once and do it right. Nothing wrong with the other choices but really think you get the best with the Ruger.
If you want a gun thats easy to carry, the Henry, or a Marlin Papoose wins.
If you want to actually shoot it then the 10/22 takedown wins.
Others have mentioned an AR. Last year I built a very fun, very accurate AR. As shown in this picture, it weighed 5.2 lbs without optics.
At one point I got it down to 4.9 lbs with an upper without a forward assist, a semi-auto bolt carrier and a lightened buffer. This all works because the gun has an adjustable gas system. With a 1 inch Leupold MkAR or a 1inch Nikon Monarch in a lightweight AeroPrecision one piece mount, the optics weighed exactly a pound.
So in summary, you could have a 4.9# AR with a set of MBUS sights or a 5.9# AR with a 1-4 optic on it.
And if you carried a spare .22 mag and conversion bolt, it could shoot .22 also.
I know its ugly. But this was a functional exercise. My next project is going to be a reasonably priced light AR built on a milspec lower.
Don
As shown, this gun weighs 5.1 lbs bare and 6.3 lbs with the optic. Oh, and thats a Lothar Walther barrel on there. Its very accurate until that skinny barrel starts to heat up.