Wow! What an awesome birthday gift! That's a great friend!
I have the exact same suppression setup, but in my case, it broke the bank..
Here it is on my Artemis PP700S-A .22 cal pistol,
and again on my Kral Arms Puncher Breaker .22 cal bullpup..
Quiet as a 'mouse fart'? Psh.. More like an 'ant fart'!
In all seriousness, I got the Emperor V3 for my .25 cal Kral Nemesis,
and I won't lie.. I really did get the extender just to throw on the pistol - as a joke!
That combo though.. WOW! It is so quiet it's ridiculous!
I've been limited to shooting 10 meters indoors only, and I really wanted to test the .25 cal..
1 shot, and the crack and echos almost made my ears bleed.. Not anymore!
Accuracy - Here's an interesting one..
With the combo on my .25, the accuracy and consistency is the same - Dead on.
With the combo on my .22 pistol, the accuracy and consistency is the same also..
But..
When I threw the combo on the Puncher Breaker .22 cal, it didn't group well at all..
I think that the added volume of the extender must have been effecting the pellets - in a bad way..
Remove the extender, use just the Emperor V3, and it was back to dead-on accuracy / consistency.
Weird..
So apparently using the combo on smaller caliber setups can be hit and miss..
My setup was originally the big-bore version, but Donny and I converted the ends down to .25 or .30
I think it originally came set up for a .45 cal

Sam -