Quote Originally Posted by crosseyedshooter View Post
I’ve always wondered about that with my Wolfman. I have it on an APC9 and use the short config to minimize gas blowback. I don’t notice any accuracy difference compared with bare muzzle. Just for kicks, I tried the long config and my accuracy at 25 yards went to hell (like 8” groups).
I have an Obsidian 9 and when I ran it with the SiCo tri-lug mount on a Hansohn Brothers HK-spec tri-lug adapter, it struck 4 baffles in the modular section (near endcap). Gun was grouping fine at 25 yd without the can. With the can, the shots were like 12"-18" high/left (way way off paper).

Got home and saw the baffles were struck.

Checked with an alignment rod but also applied force on the can and sure enough the alignment rod was touching the end cap in each of the extreme cases. I rotated the tri-lug position and it was the same thing in each position.

If I ran the short section, the can would be short enough that the rod wouldn't touch the end cap.

But the issue was the SiCo Tri-Lug mount had too much wobble since it only used 1 point of contact in the "piston" with an o-ring. I tried the Griffin Armaments tri-lug mount which has 2 points of contact and a very tight fit. There's still wobble with the long can config and if I pull the rod gently to take up any slack, it kisses the end cap but it is much better than the SiCo.

I haven't tried the Rugged tri-lug mount yet, but I think going with the shorter can config is the way to go with tri-lug.