input credit availment

Gauraksh Malik (Student CA Final ) (78 Points)

17 July 2017  
a seller is enroll under compsoition scheme and a buyer is regsitered GST entity.
can anyone tell me if i make purchases from compsite supplier, then how can i claim credit under GST as composite supplier will not charge any GST from me and like a reverse charge mechanism in case of unregsitered supplier. how it will be benficial to make purchases from composite supplier?
please clarify by provisions.