The Battle Arms Development Thumper Muzzle Brake offers a large single chamber design to reduce recoil. The two ports on top work to reduce muzzle rise. Four extended prongs disperse and hide muzzle flash. The Battle Arms Development logo is engraved on the top of the muzzle brake. With a standard AR-15 chambered in 5.56, recoil is not really an issue. However, the more you can mitigate recoil and muzzle rise, the faster you can get back on target and transition to the next one. The Thumper Muzzle Brake gives you that edge. Competition shooters, as well as hunters, will benefit with the addition of a good muzzle brake to keep their rifle on target.