BO7 Machine of War: Unlock the Mammoth LMG (S5, ~8 Hrs)
The Mammoth LMG in Black Ops 7 Season 5 is a free unlock, but only through the Machine of War event reward track — not the Battle Pass. Here's the fastest way to grind it before the event window closes.
The Mammoth LMG is free in Black Ops 7 Season 5, but you can only get it by finishing the Machine of War event reward track — not the Battle Pass — and once the event window closes, the door shuts. That's the catch nobody mentions in the launch hype.
What Changed — And When
Season 5 went live on July 23, 2026. Black Ops 7 Season 5 goes live on Thursday, July 23, 2026, at 9am PT / 12pm ET / 5pm BST. It's one of the last big content drops of the BO7 cycle, and it dumped four new weapons into the pool.
The new weapons for this season are FG42 Assault Rifle, Gremlin SMG, Mammoth LMG, and Mace melee weapon. But they don't all unlock the same way. Two come through the Battle Pass — the FG42 assault rifle (early tier) and the dual-wield Gremlin SMG (later tier) — so you unlock them by buying and progressing the pass. The other two, the Mammoth LMG and the Mace melee weapon, are free but gated behind in-game Events and Weekly Challenges you have to grind out across the season.
The Mammoth specifically is tied to the Machine of War event. As of Season 5, that's the only path to it.
Why the Mammoth Is Worth the Grind
Verdict: it's a slow, heavy hitter that punishes rushers who wander into your lane.
The Mammoth is a full-auto light machine gun. It features twin reciprocating barrels that provide massive damage with manageable recoil, balanced by a slow rate of fire, mobility, and handling. Translation: this is a hold-the-line gun, not a run-and-gun gun. If you play lane control, headglitches, and Domination anchor spots, it fits.
Its prestige attachment is the standout. The Mammoth's Prestige Attachment is the 14″ MFS Cascade Barrel, a specialized barrel that removes the weapon's pre-fire delay and movement penalties while firing. That barrel is the difference between an LMG that feels sluggish and one that actually keeps up.
If you like suppressing objectives and winning long sightlines, the Mammoth is one of the best free unlocks in Season 5.
How the Machine of War Unlock Works
Here's the part people get wrong. No. The Mammoth is earned through the Machine of War Event rather than the Season 5 Battle Pass. So don't burn Battle Pass tiers expecting it to show up — it won't.
The good news is the event is open to everyone and cross-mode. Yes. Event progress can be earned across supported game modes, including Warzone. Yes. All players can take part in the Machine of War Event and work towards unlocking its rewards.
Step by step:
- Open the Machine of War event page from the in-game Events tab once it's live.
- Complete the reward-track challenges. Players must complete the Machine of War reward track before the event ends.
- Spread your play across modes. Multiplayer, Zombies, and Warzone all feed the same track, so grind wherever you're most efficient.
- Claim the Mammoth at the reward tier where it sits, then start leveling it.
The unlock is the easy part. The real time sink is what comes after — maxing the gun to open every attachment and starting the camo grind. That's where your week disappears.
Pros / Cons of the Machine of War Route
Pros
- Completely free — no COD Points, no Battle Pass required
- Progress counts across Multiplayer, Zombies, and Warzone
- Open to every player, not just pass owners
- Nets you a genuinely strong lane-control LMG
Cons
- Hard time limit — miss the event window and the Mammoth locks away
- Challenge grind is slower than a simple Battle Pass tier
- The gun arrives at level 1, so the real leveling grind starts after you unlock it
- Slow handling means it's a niche pick, not a do-everything gun
The Numbers: What to Expect
Event tracks like this typically run one to two weeks and demand steady daily play. Budget roughly 6–8 hours to clear the reward track at a normal pace, then another chunk on top to hit max level.
Speed it up the same way you would any weapon:
- Play objective modes — Domination and Hardpoint pump match XP far faster than TDM.
- Prioritize Weekly Challenges. Weekly Challenges will go live every Thursday at 9 AM PT until the end of the season. Stacking those with event progress is the efficient play.
- Ride Double XP windows. The pre-season Quad Feed weekend showed how much these matter — it's one of the fastest ways to unlock weapons, level up loadouts, complete the Battle Pass, climb Prestige ranks, and stockpile GobbleGums.
If you want the full rundown on getting all four new guns leveled fast, our BO7 Season 5 weapons guide breaks down each one.
What Comes Next
In Zombies, rip through the undead in a new Survival map at launch and prepare to confront the Warden in the epic Mid-Season conclusion to the Black Ops 7 Zombies story. Expect the Mammoth's event window to line up with that mid-season push, so don't sleep on it — event weapons rarely return on the same free terms once they're gone.
There's also a meta wrinkle to watch. The Black Ops 7 Season 5 Reloaded update introduces several weapon balance changes, headlined by the nerfs to AN-9 and Swordfish A1, alongside a buff to DS20 Mirage. With top ARs getting trimmed, a heavy LMG like the Mammoth could quietly become more viable — one more reason to grab it while the event's live.
Grinding the Machine of War track and then maxing the Mammoth for camos is easily a 10-plus-hour commitment spread across a hard deadline. If you'd rather skip the repetitive challenge grind and just play, our BO7 weapon leveling servicefrom $29.99 takes your guns to Prestige Master through manual play with you in control of the account. It's the fastest way to have the Mammoth camo-ready before the event window closes.
