To clarify a few questions……
Unknown about no can, hence my warning. Before installing the BRT tube, it was a gassy system. I include the former standard carbine gas tube with purchase so the buyer can use it if needed. Per Triarc, it will not cycle unsuppressed, BUT we all know buffer/spring weights and gas tube sizing plays a huge role in how an upper runs.
Either way, with most any upper, if you have a SUPER smooth experience with a higher pressure can like the Enticer, your results may not be as favorable unsuppressed. Conversely, if it runs great unsuppressed, you may experience more gas to the face when you out the Enticer on.
In summary, I’d encourage you to go 100% in either direction for the optimal experience when using a suppressor that will affect how the gas system works in a DI system.