Flintlock

Summary
The Flintlock is a very cheap weapon. Ironically, it is still much better than the most expensive gun, the Navy Colt. The Flintlock costs only 80 robux for you to keep permanently, although rarely used in realistic battle situations unless you are being pushed by a bayonet rush. Flintlock, like the carbine, is a real life saver when coming to close quarter combat. Damage increases as distance decreases. To maximize damage output, aim for the head at a distance closer than 30 studs from your enemy. The closer, the better. The flintlock has a reputation for being a cheap gun that has no range, no damage, and no accuracy. This gun requires real skill to use, or you might find yourself out of ammunition and cornered by the enemy. Flintlocks are to be used only in close range and nowhere else.

Tactics
The flintlock is a good weapon, in close range. It should be used as a sidearm and not your primary weapon as you'll find yourself dying a lot if you use it all the time. The best way to use it is if you miss a shot with a different gun, don't have a good melee and you're close to the enemy.

Worth
The flintlock is a decent weapon for only 80 R$, however it is not very effective. If you are really good at combat than yes, you should get it. But if aren't sure if it will help you than practice before getting it.