If you’ve sunk dozens of hours into Borderlands 4 clearing base game vaults, farming legendary weapons, and messing around with co-op runs with friends, the first major DLC drop’s biggest selling point is easily the Borderlands 4 DLC character C4sh. This brash, ex-Hyperion demolition specialist flips a lot of standard Borderlands playstyle rules on their head, with a kit that rewards high-risk, high-reward play that feels equal parts chaotic and satisfying. I’ve spent the past two weeks grinding every skill node, testing every possible build, and running him through both endgame raids and casual open world content to figure out exactly what makes him tick, and what you need to do to make him feel unstoppable.
What Makes the Borderlands 4 DLC Character C4sh Stand Out From Other Vault Hunters?
Unlike most base game vault hunters that focus on either self-buffs, direct damage, or support abilities, C4sh’s entire kit revolves around explosive charge placement and chain detonations. His core passive is every explosion he triggers grants him a 3% movement speed and reload speed stack, up to 15 stacks total, which turns him into a fast-moving damage machine if you play to his strengths. I noticed a lot of new players sleep on this passive when they first unlock him, writing him off as a one-note explosive spammer, but the stack buff makes him surprisingly versatile for both kiting tough bosses and rushing through loot-filled vaults.
The Borderlands 4 DLC character C4sh also has a unique melee attack that places a small sticky charge on enemies, which detonates after 2 seconds for extra splash damage. This is great for taking down tanky enemies that get too close, without wasting your larger action skill charges. I tried running a sniper build on him for fun when I first unlocked him to see if he could work for long-range play, and it was absolutely terrible, so don’t waste your time trying to build him outside of his explosive niche.
Top 3 Optimal Builds for C4sh for Every Playstyle
After testing over 12 different skill combinations across 20+ hours of gameplay, these are the three builds that work best for solo, co-op, and endgame loot farming respectively. If you’re new to playing the Borderlands 4 DLC character C4sh, I recommend starting with the first build, since it’s the easiest to learn and doesn’t require you to manage a lot of different perks at once.
None of these builds require ultra-rare legendary gear to work well. I ran the Full Explosive Chaos build with a blue-rarity rocket launcher for my first 10 hours with C4sh, and it still performed better than my fully kitted level 50 Moze build from Borderlands 3. The only thing you absolutely need to avoid is investing in perks that boost non-explosive damage, since they don’t sync with his core passive at all.
Hidden Perks and Common Mistakes to Avoid With C4sh
Most players don’t know that you can stick C4 charges to loot containers to open them all at once from a safe distance, which is a huge time saver when you’re clearing areas full of mimic chests that explode when opened. I learned this by accident when I threw a charge at a group of enemies hiding next to a chest, and it popped the chest without triggering the mimic’s counterattack. It’s saved me from dozens of unnecessary mimic fights since I figured it out.
The most common mistake new C4sh players make is detonating their charges as soon as they place them. You get a 40% bonus damage if you wait 3 seconds after placing to detonate, and you can see the charge flash red twice to know when the bonus is active, so don't waste that extra damage by blowing them up too early. Another common mistake is forgetting that C4sh takes 20% reduced explosive damage from his own charges, so you don't have to run away every time you place a charge right next to you. I used to back up every time I placed a charge until I realized this, and it slowed down my playthrough a ton.
If you're playing on Mayhem 10 or higher, you should still keep a little distance from large cluster charges, because even with the damage reduction, a full stack of 5 charges can still take off half your health if you're standing right on top of them. It’s a small tradeoff for the extra damage, but it’s easy to forget when you’re caught up in a chaotic fight.
Best Gear Pairings to Maximize C4sh’s Potential
The best weapon for C4sh is the legendary "Boom Boom" rocket launcher that drops from the final DLC boss, it has a 50% chance to fire an extra charge every time you shoot, which pairs perfectly with his stack passive. If you can't get that, any rocket launcher or grenade mod with splash damage bonus works really well, even if it’s only blue or purple rarity. You don’t have to grind for dozens of hours to make the Borderlands 4 DLC character C4sh feel powerful, even basic gear can make him a force to be reckoned with if you pair it with the right perks.
For class mods, the "Demolition Specialist" unique class mod that drops from rare spawns in the DLC’s open world area is unbeatable, it gives you 2 extra charges for your action skill and boosts your stack cap to 20 instead of 15. If you can’t find that, look for any class mod that boosts explosive damage or reduces action skill cooldown. For shields, look for any shield that has an "explosive damage on break" perk, so if your shield goes down, you trigger an explosion that knocks back enemies and gives you time to reposition.
The only gear you should completely avoid is any weapon that deals elemental damage without splash, because it won't trigger his passive stacks at all. I picked up a legendary incendiary sniper rifle early on in my C4sh playthrough, and it felt completely useless compared to even a common green rocket launcher, so save your inventory space for explosive gear only.
At the end of the day, the Borderlands 4 DLC character C4sh is one of the most fun, versatile vault hunters added to the franchise in years, and he’s worth picking up the DLC for even if you’re only a casual Borderlands fan. You don’t need to follow any build to the letter to have fun with him, but the tips and builds we covered here will help you avoid the common pitfalls that make a lot of new players write him off as too complicated or weak. If you’ve already been playing C4sh, drop a comment below with your favorite build or hidden trick you’ve found while grinding.