Biter Nests are not to be messed with early game. While your pistol or machine gun will be good for stopping small swarms of Biters from attacking your pipelines, bringing the fight to their home turf ...
As you progress further in Factorio, the enemies known as Biters are going to begin attacking your base. This can be frustrating as a Biter swarm can destroy a lot of machinery you've worked you hard ...