The package includes: the “plus five” magazine base, a longer magazine spring and an Allen key for tightening the baseplate pin.
So you use just your existing magazine body and the follower.
According to the manufacturer, the base plates are made from 6061 aircraft grade aluminium and are hard anodized.
The machining on them is very nice anyway and the surface is perfectly smooth. They even added these little cut-outs for the magazine tabs. So, you don´t have to cut them off your magazine, and are still able to use your original mag base – should you want to switch back to it.
So, should you want to buy some yourself now, I can only recommend them!
Here is the complete video-review =>