This looks VERY intriguing.

http://www.thefirearmblog.com/blog/2...air-sandman-k/

At first glance, the 5.4″ long and 1.5″ outer diameter can may seem like a status quo for the Dead Air team, however weighing only 12.8 ounces and adding only 2.9″ past the muzzle device is a big deal for a .300WM rated silencer. The 5.56mm decibel ratings are 149 at the muzzle and 140 at the ear respectively. Not too shabby for a silencer with a flash hider-sized footprint.