Which component reduces recoil by directing escaping gases at the barrel?

• A. Bore evacuator
• B. Muzzle break
• C. Skirting
• D. Idler wheel

Answer: (B)

When a gun fires, propellant gases rush out of the muzzle and create a backward push on the barrel—recoil. A muzzle brake mounted at the muzzle uses vents or baffles to direct those escaping gases to the sides (and sometimes rear). By changing the gas flow, the brake generates counteracting forces that oppose the barrel’s backward impulse, reducing recoil and helping control muzzle rise for quicker follow-up shots. The bore evacuator, idler wheel, and skirting serve other purposes (venting bore gases to protect the crew, or being track components) and don’t affect recoil in the same way.