Thanks for the insights on the Ti-Rant 9 S on the MP5!
The Mini-4 has been a head-shaker of a product for me for years.
Way back, pre-H&K IAR, the Marine Corps wanted a small can they could use on their 20" M16 variants (Riflemen All!) to just take the edge off. Surefire had made a little can for them, so we took the M4-2000 variant of the day (with the vented stack from the 416-SD. The Bin-Laden can!), and deleted 3 baffles and two spacers and shortened the tube accordingly.
Viola! The Mini-4 was born!
On a 20" gun, it's surprisingly pleasant.
On a 14.5" or 16" commercial gun, depending on how old you are and how jacked up your hearing is, it's not bad.
On a 12.5" or (God forbid) a 10" or shorter gun. What? What did you say? What? Look at me when you talk to me!
Yeah, like that.
I think 99% of the Mini-4's sold wound up on super short guns. "It's a small gun! I need a small suppressor!"
This hypothesis has been born out by looking at the hosts the Dead Air Sandman K winds up on.
Thanks for the inspiration to trot down memory lane!
SilentMike