The KynShot recoil damper helps to reduce felt recoil up to 30%, allowing for faster and more accurate follow up shots. Tested and vetted by law enforcement, competitive shooters, and military alike! The high-strength 17-4 stainless steel construction is virtually impervious to corrosion. Combined with their military grade materials and manufacturing processes, and KynShot offers a conditional warranty for 10 years or 1 million rounds! For subsonic ammunition such as .300BLK, especially when running unsuppressed, the RB5000L is recommended for proper function.