Yes, AFGHANS is a Scrabble word!

Letter values in Scrabble US: A 1, F 4, G 2, H 4, A 1, N 1, S 1.

Is it a valid word?

AFGHANS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a blanket knitted or crocheted in strips or squares; sometimes used as a shawl
a native or inhabitant of Afghanistan
an Iranian language spoken in Afghanistan and Pakistan; the official language of Afghanistan
a coat made of sheepskin
tall graceful breed of hound with a long silky coat; native to the Near East

Also: sheepskin coat, afghan hound.

Not playable in Scrabble US: AFGHANISTANI, PASHTO, PASHTU, PAXTO.