In the new version of Call of Duty: Warzone, you’re only as good as the weapon you’re carrying. Much like its predecessor, how well you perform is tied to the attachments on your weapon, which are earned by gaining XP. In this installment, leveling up weapons can feel like a grind, meaning you’ll need to find an effective method to farm XP. Thankfully, there are several useful methods for earning weapon XP, allowing you to earn all attachments quickly.

Here’s how to level up your weapons fast in Warzone.

Likely the fastest method is to complete contracts on the two Resurgence maps, Ashika Island and Vondel. These are smaller-scale maps that allow you to keep respawning, making them ideal for quickly finishing contracts. Ashika Island is technically smaller, but Vondel is more dense, so both work well.

The main goal is to purchase your loadout weapon from a Buy Station before you begin a Scavenger, Safecracker, or Most Wanted contract. Do your best to continuously complete them as safely as possible, without focusing on getting kills. Most Wanted contracts work well since you can keep opening chests to reduce the timer.

Safecracker contracts are similar to Scavengers from the original Warzone, wherein you must visit three locations to collect loot. In this entry, instead of opening chests, you must blow up safes using C4, but the premise remains the same. The nice thing about this method is that it’s usually a safe (pun very much intended) way of gathering XP. Complete as many of these Safecracker contracts as possible to rack up a ton of XP and cash.

Plunder is a much more relaxed game mode that focuses on gathering cash more than surviving. Because of this, it’s easier to complete contracts, especially if you work with a team and use a vehicle. Plus, respawns are enabled and you begin with your loadout weapon, so it’s a great method for newcomers.

Both of the aforementioned methods require you to be familiar with Warzone 2.0, which can be offputting, especially to newcomers. If you’d like to get a sense of how movement and gunplay work, it’s best to play Call of Duty: Modern Warfare 2, as it shares an engine with Warzone 2.0 — specifically, the new Shoothouse playlist, which is a smaller map. This makes it easier to get into a lot of engagements, with the potential to rack up a lot of kills each match. Of course, the more eliminations you earn, the more XP you’ll get. The caveat is that Modern Warfare 2 isn’t free, so if you don’t want to spend money, you’ll want to skip this method.

Finally, you can jump into DMZ to earn weapon XP in an efficient way by taking out AI and completing mission objectives. This isn’t the fastest way to earn XP, but it can be more consistent than playing battle royale, especially if you’re a new player. Dipping your toes in DMZ is an effective way to learn the ropes, and the XP you earn is enough to warrant giving this mode a try. Just be sure you don’t lose the weapon you’re attempting to level up.