Fascinating- I read their link.
Personally I like how AIA did it. Savage style barrel collar, easily adjustable headspace with a front sight that can rotate 360 degrees with the loosening of some socket head screws. A great update that was on the original design.
Unfortunately, the AIA setup doesn't allow for bayonet lugs as they would likely be out of index.
Would love to see chambers cut that are the actual correct depth needed, not 1/2" too long to accomodate mud and dirt and debris to keep the rifles functioning under any conditions.
I wonder how well these will sell at the price? That would likely be $450 CAD or more.