The TZ-2 is a durable & light-weight polymer magazine coupler, made for secure magazine operation and rapid magazine change. The coupler facilitates swift magazine change, quick and easy installation, and improves operational efficiency and performance. It is compatible with M16/M4/AR15; AK-47, Galil; H&K 33,53; Ruger Mini M14; Sig 542,543. This model has a black finish.