I don't have a Ruger PCC, but sounds cool to me.
http://9mmar.com/spikes-9mm-flash-hider-1-2x28-thread/
http://androcorpind.com/9mm-flash-hider-assembly-1-2-x-28/
It might be cool, but will probably be of limited usefulness and will just add length to your carbine. I couldn't wait to get a PCC, and jumped on the first one available, even though it was the neutered version with 10 round mag and non-threaded muzzle. Since I didn't plan on getting a can, and didn't care about the Ruger mag, I bought it and haven't been happier.
1/2 -28 Gotta be careful it has a 9mm hole.(,355)Is the thread 1/2-28 or 1/2-36? Some makers use the finer thread so you can’t accidentally mount a 22 caliber accessory.