Ruger 10/22 Takedown in Stainless (I like the Mossy Oak version) with a few 25 round mags and a sack full of ammo. Twist on a Silencerco Sparrow suppressor and you are good to go.

1311 for up close and personal. Is there any other choice?

They will never hear me coming or going. Less noise = less zombies. Invisible man ftw.