I’ve tried pushing the clips through the guide above the port.
They go in fine but then it takes a mightier man than me to get more than 3 rounds in.
I was looking to save weight but I must have the strength of a newborn baby.
Wiggle the brass side to side to loosen it up in the clip wiggle them a bit when you push them in. It is still not easy. I got a scope over mine so I have to load the magazines by hand.