You can find the LanTac Dragon Muzzle Brake .308/7.62 here.

The LanTac Dragon Dead Air KeyMo Muzzle Brake has a built-in KeyMo Quick Mount Adapter for Dead Air KeyMo Sandman suppressors. The Dragon reduces recoil and muzzle rise by quickly dissipating the muzzle blast gases, which reduces the flash signature. The unique Short Energy Pulse system reduces the amount of recoil, which can allow for more accurate follow-up shots for full auto fire or rapid semi-auto fire. Manufactured to the highest quality standards out of hardened Mil-Spec steel and Nitride coated. Made in the USA.

Specifications:

• Caliber: .308/7.62
• Material: Hardened Milspec Steel
• Finish: Nitride
• Dimensions: L: 2.760", DIA Body: 0.824", Mount: 1.080"
• Weight: 3.42oz
• Thread: 5/8-24 UNEF R/H