This is a Talon/Katana molle mag holder.
The 2 Halves just snap together and held by an Elastic band or an o-ring,
I specifically used an O-ring DIM: 40mm OD x 3.1mm
there are 2 slots for the o-Ring placement just in case you want the mag holders to sit side by side
for the clips, i split it in 2 parts, Loop clip(split and full) and top loop clip
This Holders are for sale only by me, and no one else, so hit me a message either here or on Facebook. (considering to put an etsy page) my price range is less than $9 AUD, so really cheap. but then again, the Files are free for you to print and Use.