The developed and engineered The Answer Self Timing Muzzle Brake is for competitive shooter who needs something really lightweight. It uses the same tunable technology and brought it to Gen 3 Little Bastard along with a nut design and an additional port. This brake features URP (Unique Recoil Profile) Top Ports which allows the shooter to not only combat direct recoil but muzzle rise and lateral movement based on the characteristics of their rifle, personal grip, stance and the position they are shooting from. It also has additional row of bastard ports, and lock-nut design. NOTE: This brake is meant for smaller barrels from AR-15's to hunting rifles. It is recommend for a barrel with a diameter of .600-.750 inches.