No, it is not a typo or lack of knowledge. This product is really a “magazine clip”. Probably the inspiration to design it came from the expression used by the infamous politician. MC17 is a Glock magazine accessory made by Recover Tactical. It adds a belt or pocket clip to the magazine. When the magazine is inserted into the gun, the clip rests inside the Glock grip cavity.
MC17 is designed for Glock 17 magazines, but it will also fit in G19 pistols if using the G17 magazine. This is a drop-in accessory. In order to install it, you need to remove the original Glock magazine floorplate, install the MC17 floorplate/adapter, then snap in the belt clip. If you don’t need the clip anymore, you can remove it and install a base plate cover which comes with the kit too. Obviously, you can’t use this magazine clip if the grip cavity is obstructed with any aftermarket accessory (plug, Seattle slug etc.).
The MC17 is made of glass reinforced polymer. Currently, only the black version is available on Recover Tactical’s website. However, the video from their website shows several different color option. Possibly these colors will be available later.
There is also an optional Picatinny rail section, which you can add to the floorplate for whatever reason.
Phil Note: Just to let everyone know Recover Tactical contacted me a few days ago and they are sending some of these clips for our evaluation. As soon as I have a chance to test them a bit I’ll let everyone know how well they do and if they are worth investing in.