Spikes Tactical SBV1065 R2 Muzzle Brake Black Nitride 416R Stainless Steel with 1/2"-28 tpi Threads for 5.56x45mm NATO $52.20
Spikes Tactical SAKB0200 Barking Spider2 Muzzle Brake Black Nitride 4140 Chromoly Steel with 5/8"-24 tpi Threads, 3.75" OAL & 1.40" Diameter for 30 Cal $121.46