In this work, we present the IND-CPA secure (quantum) dual version of group ring based McEliece public key encryption (PKE) proposed in Mittal et al. (JDMSC, 2023). We show that in comparison to the classical PKE, the dual version is much more efficient. Further, we also present IND-CCA2 secure key encapsulation mechanism and IND-CCA2 secure PKE and show that both of these are quantum secure. Furthermore, we discuss the associated parameters with all the three schemes and also discuss a toy example to showcase their practicality.