Heavy Machine Gun
The Heavy Machine Gun is a cheap but overall underwhelming weapon. Its agility is what holds it back the most it; it does very decent damage, but it can't get anywhere quickly. It boasts a humongous clip, but the Siege Cannon laughs in the face of the Heavy Machine Gun. It's essentially the exact same weapon except with much, much better damage.
The weapon plays best against weapons that don't have the range that this weapon has. The weapon kills fairly quickly, enough to beat players with shotguns before they're close to you - but once again, the Siege Cannon is much better at this. The weapon is still one of the better newbie weapons though, you'll often be surprised by how quickly it depletes your health if you get too close to it.
Beating the weapon is quite simple; if you can overcome the damage, the player with the weapon has nowhere to run due to their low agility, so take advantage of that can beat them. The weapon is most likely in the hands of an inexperienced player as well, so beating them with experience should be fairly simple.
The weapon plays best against weapons that don't have the range that this weapon has. The weapon kills fairly quickly, enough to beat players with shotguns before they're close to you - but once again, the Siege Cannon is much better at this. The weapon is still one of the better newbie weapons though, you'll often be surprised by how quickly it depletes your health if you get too close to it.
Beating the weapon is quite simple; if you can overcome the damage, the player with the weapon has nowhere to run due to their low agility, so take advantage of that can beat them. The weapon is most likely in the hands of an inexperienced player as well, so beating them with experience should be fairly simple.
TL; DR
Good weapon early on in the game, but you'll grow out of it really quickly as more, better weapons become available. The Shotgun is the weapon you should be using early on also, it is a surprisingly decent weapon.