Modular suppressor: Obsidian 9 vs. Wolf 9-SD

Rugged Obsidian can be dis-assembled for cleaning, Wolf-9SD can not.
The rugged is only rated fro .300 BLK sub-sonic, The Wolf is rated for .300 BLK supersonic ammo.
Both companies offer great quality products.
I use the long configuration on my SBR & pistol, I was never interested in the short configuration of the modular cans, just was impressed by the level of sound suppression in the Rugged.

In theory, the short configuration makes your weapon more portable. In reality, most people don't seem to ever use the short configuration, as they're usually pretty borderline if not over 140 dB.

I'd personally recommend a non-modular; you'll save a lot of weight. Obsidian 9 is 12.7 oz in full length, and the Wolf is a whopping 14.7, and that may not even include the booster piston (+1.5 oz). A pound hanging off the end of a handgun is obnoxious. There are a number of 7-8" long 9mm cans weighing 9-11 oz. Octane 9 @ 10.8, Osprey 9 @ 9.8, AAC Ti-Rant @ 9.5, Griffin Resistance @ 10.2 ( my Phoenix is 8" x 1.25" diameter and 9 ounces with piston. Just FYI).

or maybe check out the DA Ghost-M at 12oz full length, 9.6 short. I would think depending on your use, the modularity could be used a lot.