It looks like AAC either has a huge back log or is no longer producing 51t mounts. I do not like the idea of spending 150$ every time I have another firearm I want to attach my suppressor to. Does anyone know of a way to convert a 51t suppressor to a fixed mount?
It DOES look like the 1/2x28 flash hiders are out of stock, but I doubt they're not producing them anymore, as they still sell the M4-2000 and SDN-6, both 51t cans.
As for converting, you'd probably have to find someone to pin or weld an existing flash hider or brake into the can. It WILL void the warranty.