I have the Oryx chassis holding a Howa 1500 action (6mm Creedmoor). I am also very happy with it and echo JLT's comments from above, with a few more of my own...
The Howa 1500 is a 26" heavy barrel and fits in the chassis with PLENTY of clearance not only for the barrel float but for M-LOK fasteners as well. The M-LOK slots are well machined and my device mounted easily. The action fits the chassis so well there is no need for bedding, just drop it in, torque the screws correctly, and done.
The way the chassis is shaped just above and behind the trigger makes for a good thumb rest. I do not know if this was intentional on MDT's part but it works for me.
I have shot sub-MOA groups out to 1000 yards (see the attached image) using this chassis with nothing more than the stock Howa 1500 (with a trigger mod to reduce pull), factory Hornady Match ammo (ELD 108gr), a Harris front bipod, and a
JAMER Rear Bag Rider.
For the 1000 yard target I was shooting from the prone position on a shooting mat with light butt pad pressure, almost none really. I have also shot from a seated bench position and it works just fine for that as well.
It takes AICS magazines, although with the Howa it takes a simple modification to the front of the magazine, just cutting out a small notch. This has nothing to do with the Oryx, it is just the way the Howa chassis is made. I used 1000 grit sandpaper to polish the anodizing in the magazine well and that made it easier for magazine insertion/removal. A bunch of insertion/removal cycles will burnish it in as well.
In short, when I build my next rifle, I will buy another Oryx chassis.
Apologies if this post was too old to resurrect.