这个帖子对recoil reduction 分析很好,仔细看“Pros & Cons of Angled Baffles”这一段。
During my tests, a manufacturer sent me a prototype of a muzzle brake with 45° baffles back toward the shooter. It provided outstanding recoil reduction (better than anything shown here), but while testing that brake, a friend helping me with the tests caught some shrapnel in his side.