Does fit +5 after use. - Agency Arms G17 Compatible Magazine Extension

When i did get this mag extension initially it didn't hold the +5 that it promised. But after unloading and loading it a few time the spring finally gave way and was able to get the full +5 into the magazine. It required quite a bit of force to get the last two rounds into it but after the first time it was fully loaded i haven't has issues loading the +5 into the magazine. Assembly on this mag extension is a pain in the butt. Function wise there are no issues that i ran into while using the magazine with this extension on it.