Wolf and other manufacturers will probably offer uppers with nitrided barrels. Not sure if I am a sample of one but the only extraction issues I've had with steel-cased ammo (5.45x39) was with a nitrided barrel. Ex-ComBloc manufactured weapons to be imported will likely have chromed barrels/chambers but American makers will cheap out.
The idea someone mentioned of making it a true .355 caliber for the American market is a good one. If you figure that 300BLK supers are roughly half the weight of subs (110-120gr vs 220gr) a *decent* super in 9x39 would be in the 135gr range. Then they'd have to be aerodynamic as opposed to just loading blunt pistol bullets at 2100fps in the hope of hitting accurately at 200 meters.
11C2P '83-'87
Airborne Infantry
F**k China!
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