The best part of a braked rifle is recoil suppression the worst part is the muzzle blast or listening to people complain about it. This looks like a simple device to fix the problem, a simple sleeve over the brake directing the blast forward.
http://www.thefirearmblog.com/blog/2013/03/30/simplistic-shooting-solutions-qd-brake-shield/
I'll take the first clamp on one for my 338
http://www.thefirearmblog.com/blog/2013/03/30/simplistic-shooting-solutions-qd-brake-shield/
I'll take the first clamp on one for my 338