JRMS

Jacob, it's not excess material, it's more that the feed mechanism doesn't push up, like there is too much resistance for the spring.

The feed sits higher on the mag that works (on the left) and has some spring to it (although, if I push down on it, the rear of the base plate moves). The other two do not have any movement. Thanks for helping me with this.

Jacob Wright: The magazine definitely moves slightly farther in.

Not so far. If I put pressure on the bottom of the magazine, it feeds properly. As soon as I release the pressure, it doesn't feed at all.

If anything, they are loose, so inserting and removing them a few times isn't going to help. Thanks anyway.

They were brand new, but I didn't test them for ages due to catching Covid and then suffering from long-Covid, thus putting them outside a reasonable return window. They do seem to be identical to the one that came with the rifle, but I haven't made any precise measurements. I haven't received any feedback from Airsoft Zone UK.

I have a Tokyo Marui M40A5 Sniper Rifle and purchased two extra TM-MAG-M40A5 magazines from Airsoft Zone UK. Neither of the two new magazines fit tightly and therefore do not feed pellets into the gun. Does anyone know of a method to adjust the fitting to allow all three magazines to work? I have also asked Airsoft Zone UK for comment.