What about the SA80? Yes its a small calibre to you beefy Americans and yes it's only found in England. But the thing is insanely accurate and reliable (thank you bullpup). The insides got a makeover by H&K. And there are civ legal variants you can get your hands on. But like with all things there's a downside. Its kinda awkward to use. The cocking handle is on the right side and is kinda small. Think MP5 but hidden away. But in terms of SHTF it would be perfect for those poodles that are far way.And if on come right up to you, you can smack it with the mag that jutting out. Oh and it uses stanag mags so just find a dead
Marine sorry National guard and take his ammo. Heres a
link.