I contacted Briley a month or so ago and they were hoping to have them in a month or so... hopefully soon
I did as about 922r and was told this
"Yes, All the materials used: steel, titanium, aluminum extrusions, aluminum bar stock, carbon and all machining is USA made. "
They are also planning a full length carbon fiber magazine tube... not sure how I feel about that
Yet I've been fine shooting through modified for YEARS... it's more important to check slug type.
Seems like an odd statement given they ship thousands of m4s with modified chokes... unless they expect m4 users to only use birdshot. But of course there are no typos on websites...
https://www.benelliusa.com/customer-service/faq#question_1394
It specifically says it is not safe to "shoot slugs through chokes tighter than those listed here.
4 notches = improved cylinder
5 notches = cylinder
I bought the Imp Cylinder and Cylinder chokes as well, It is clear that the slugs are squeezing through the one that came with the gun. Also I have heard (not experimented) that the buckshot pattern is better when you use the federal premium flight control wad if you use an IC or C because the modified strips the wad prior to its intended purpose. At 15 yards my spread was about the size of a widely spread hand. one of the others was the size of a fist and he had the cylinder choke in.
I did buy them, but haven't switched them out and experimented.