Why does the heavier guns are preffered over lighter ones ?

Explanation

### Step-by-Step Solution

1. **Understanding the Concept of Momentum Conservation**:
When a gun is fired, the bullet is propelled forward, and the gun experiences a backward motion known as recoil. According to the law of conservation of momentum, the total momentum before firing must equal the total momentum after firing, provided no external forces act on the system.

2. **Defining the System**:
We consider the system to be the gun and the bullet. Before firing, both are at rest, so the total momentum is zero. After firing, the momentum of the bullet moving forward must be balanced by the momentum of the gun moving backward.

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