Black Magpul MOE collapsible with carbine buffer, spring and buffer tube for $57.99. This is cheaper than most places have just the stock going for.
http://palmettostatearmory.com/inde...almetto-state-armory-moe-stock-kit-black.html
http://palmettostatearmory.com/inde...almetto-state-armory-moe-stock-kit-black.html