NEMO Arms Signature Series QC-1 Muzzle Brake .30 Carbine/7.62mm 5/8x24 Matte Black. Three forward ports direct gasses rearward at a 60-degree angle for maximum recoil reduction. The primary baffle directs gasses perpendicular to the barrel bore helping divert rearward gasses away from the shooter. Specifications for NEMO Arms Signature Series QC-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: 1 in Length: 3 in Weight: 2.63 oz Gun Type: Rifle Package Contents: NEMO Arms Signature Series QC-1 Muzzle Brake What firearm models does the manufacturer say NEMO Arms Signature Series QC-1 Muzzle Brake is compatible with? The manufacturer suggests that NEMO Arms Signature Series QC-1 Muzzle Brake is compatible with AR-10NEMO Arms NSP-30C-MB-QCTST: Signature Series QC-1 Muzzle Brake .30 Carbine/7.62mm 5/8x24 Matte Black