Comes with velco for both sides.
These are the specific 2011 kywi insert. In the picture, regular pistol on the left and 2 of the 2011's on the right. Designed for 2011 magazines, these also work well with full size and compact double stack metal magazines such as those used with P320's, M&P's, VP9's, etc.
We only have a few pouches with these inserts as standard. If you order a pouch that is not in the 2011 section you will also need to order these and replace the standard inserts that come in the pouch. We have a large selection of pouches and right now it will muck up the works if we do all of them standard in the 2011 section.
Per 1
Disclaimer:
Will these Pistol KYWI inserts work in other manufacturers equipment? The honest truth we have no idea. We have been told by customers that our Pistol KYWI inserts work in other manufacturers equipment but we can't tell you which ones they do and don't work in. We do not buy other gear company's equipment and test our inserts in them so we can't tell you what they are going to work or not work in. If you decide to buy our Pistol KYWI insert to use in a different manufacturers equipment that is your choice.