The 358 win isn't actually too bad. Its ported and the heaviest loads I shoot are 2600 fps with 200TTSX and 2400 with 225 NPTs. The 158 CE raptors at 2800 fps are plenty fine. Also keep in mind that is 3.6 pounds before optics. Its like 4.3 pounds scoped.
As far as the brake yeah its direct thread. Basically the CB mount is welded inside. That way I don't have to buy a CB mount for every rifle I have. A simply bushing up from 1/2X28 to 5/8X24 and I use it on my .223 without issue. Yeah I am not doing mag dumps with it but it works just fine and is plenty quiet that way.
