.22 "Survival" pistol

[MED]

I'd like to get myself a .22 pistol I can keep in my bug out pack. I'm pretty sure I want a Ruger target model of some sort but I'm not sure on the optimal barrel length, improvements or accessories. I've seen pistols doing Google searches with everything from lasers to red dot sights, tactical lights etc. What are you guys using for this type of thing? Pic's and details would be great. I picked up the 1911 milspec I've been looking for so I'm thinking about trying to swap my Detonics Combat Master for the "Survival" pistol.
I've also posted this in the rim fire section hoping to get another point of view. Hope that's OK with the Mods.
Broadsword

I keep a Ruger 22/45 4" and 10/22 in my trunk in a case with many mags. I shoot these with my son just about every weekend. FYI - RIM fire mags are exempt from the Denver Ordinance. This along with my carry pistol serves my purpose.