Hi guys, I posted this over on arfcom. It explains a little bit the "why" of the 556 TD
The 556 Take Down was originally designed to meet the 2017 SURG solicitation (in conjunction with an upper obviously), which includes pretty stringent dB (ear and muzzle) and cost requirements, firing schedule / thermal requirements, as well as the ability to fully service and replace the core without removing the suppressor from the upper, and some other stuff that typically does not apply to the commercial market (like blank firing adapter compatibility and survivability when fired with live ammo by accident). The result of that design problem was this set of features.
This can is not the be-all end-all for all applications, it's actually a pretty narrowly focused design.
Going all out for a 10" F/A capable suppressor with a QD, light weight, etc, like we did for precision rifle with the Ultras, would have been more expensive and also not met the other requirements (e.g. nominal cost core replacement without removing suppressor from "integrated" upper). It is very likely that we will address that application in the future.