ATI Outdoors A5102251 Shark Muzzle Brake Black Oxide Steel with 1/2"-28 tpi Threads for .223 Cal/5.56 AR-15 $34.94
VG6 Precision APVG100021A EPSILON Black Nitride 17-4 Stainless Steel with 5/8"-24 tpi & 2.84" OAL for 7.62mm M5 Platform $88.99