Mounts over an M4 stock tube as such it is compatible with both AEG and GBB M4 types although just to be sure it is compatible with your exact stock tube / model of weapon do be sure to ask the sales department staff.

This little module adds QD anchor points to the left and right side just rear of the receiver offset at a slight angle downwards. This module also comes with a single QD sling mount ring as well.