I must have missed this post. I ordered a few things from Lakeline for my CM9 and had a similar issue. IIRC, basically the plastic bases advertised were swapped on the description. Luckily I had ordered the plain base and the base for the extension. The extension base on the website turned out to be the plain base and vice versa... again, IIRC, as it was a long time ago. I can't remember if I called or e-mailed, but I made them aware of the issue but don't know if they ever changed it. I haven't purchased anything since (although that purchase order also included two 9mm followers that have been working fine). I use all of the components listed above and am very happy with them... although recently my CW45 has distracted me from the CM9.