Documentation file complete. Going to test it and then if it works send it off to sail. Uses two spring loaded plungers installed into the side of the receiver using JB Weld'd threaded inserts. Any one see why this might not work?
-- sleepy echidna
The bolt has to overcome the resistance of the bearings and push them into their recesses. This delay will hopefully reduce the amount of gasses escaping from the breech. This is also what the "Scropion Evo Gen 2" drop-in receiver does and that has been very popular (recoil impulse and suppression improved). That's also just two spring loaded bearings working against the bolt. By comparison, it's not as intricate as something like the "Mean Arms Bearing Delay" which has a mechanical disadvantage by pushing a shaft/bolt out of the way before the bolt carrier can move.
I read on a random comment somewhere that the Urutau developer was trying to implement a delayed action. Is anyone aware of work in this area? The null-22 developer also has a video working on a delayed blowback mechanism that features more of a mechanical disavantage design, but it looks like it relies on a lot of plastic on plastic in the bolt.