So, while I keep looking for a Triad 3 lug adapter to appear, I have questions...

The AAC Evo and TiRants have the ASAP system for pistols, but will it work properly on a rifle?

Do I need to add a fixed barrel spacer to use it on my Sub 2000 or Ruger PCC?

I'd like it to go between a couple of pistols and rifles without swapping out parts.

If the barrel is fixed, like on a carbine, use the "fixed barrel spacer" to keep the silencer from wobbling around, inviting a baffle strike.
Most semi-auto pistols need the barrel to move during the cycle, hence the need for ASAP or neilson device, allowing wobble to keep from breaking parts.

I use a spacer when the tirant is mounted on my .300BO, or MPX without the tri-lug.
The threaded mount with spacer has less wobble than the tri-lug does.

Just my opinion.