NEMO Arms Signature Series TC-1 Muzzle Brake .30 Carbine/7.62mm 5/8x24 Matte Black. Ports are biased to force gasses upward to help reduce muzzle rise. Specifications for NEMO Arms Signature Series TC-1 Muzzle Brake: Manufacturer: NEMO Arms Color: Silver Caliber: .30 Carbine 7.62x39mm Finish: Bead Blasted Matte Fabric/Material: 6AL-4V Titanium Threads per Inch: 5/8x24 Gun Make: AR Platform Gun Model: AR-10 Outer Diameter: 0.975 in Length: 2.75 in Weight: 1.88 oz Gun Type: Rifle Package Contents: NEMO Arms Signature Series TC-1 Muzzle Brake What firearm models does the manufacturer say NEMO Arms Signature Series TC-1 Muzzle Brake is compatible with? The manufacturer suggests that NEMO Arms Signature Series TC-1 Muzzle Brake is compatible with AR-10NEMO Arms NSP-30C-MB-TCT: Signature Series TC-1 Muzzle Brake .30 Carbine/7.62mm 5/8x24 Matte Black