simonrichter - The Glock 42 is a very shootable .380. It's larger than the LCP but I can carry mine in my fronts pants pocket. And if you're carrying it in a backpack that bit of extra size that shouldn't be a problem. Mine has been great as far as reliability and it shoots straight.
Here's a comparison of the two.
https://www.handgunhero.com/compare/...2-vs-ruger-lcp