Last time I spoke to marstar, They had a complete Stock (But, Forearm,and handguards for a No4MKI for about $140.00. They did not have any bands .
But worth to check again. I wanted to reconvert mine But my barrel has been shortened to 21.5 inches so I would have to change BBl too. So I changed my mind, Too $$$ for me.
Good luck
Shrek in uniform