They solved the double stack feeding problem in an unconventional way. If you use a two lug bolt, it's next to impossible to get the magazine high enough to strip the rounds correctly without having feeding errors like crazy. To get a 3 lug bolt to feed is even harder, it not impossible, if you have one lug at the top and the other two at 120* and 240*. Alternative is to flip this to one lug pointing down, so it fits between the magazine lips. Doing this then creates problems with the trigger position and your cocking piece.
They've put the magazine out of the plane where the trigger/cocking piece area to get around this. From the looks of it, it appears to be a 60* throw, so triple lug format. To have one at 270* for the magazine, the other two are in an unconventional position, but it avoids the cocking piece.
They wanted to do a bolt gun with AR double stack mags and they made it work. That aside, I think the grip/butt could have been a more elegant design, pretty cool rifle!!