Season 3 hasn't been short on strong weapons, but the MK35 ISR is the one people keep coming back to. After a few games, it's easy to see why. It's smooth, steady, and weirdly forgiving for an AR that shoots this fast. A lot of players are already comparing it to older fan favourites, and that checks out. If you're trying to farm kills, level faster, or just want cleaner matches while testing setups like a CoD BO7 Bot Lobby, this rifle feels like one of the safest picks in the whole update. The recoil barely fights you, the sight picture is clean, and mid-range fights feel simple in a way most new guns don't.

Why players are chasing it

The MK35 ISR doesn't hit like a truck, and that's the trade. What it gives you instead is control. You stay on target. You miss less. In actual matches, that matters more than people admit. A gun with easy recoil and a fast fire rate lets you clean up fights before the other player settles in. It also scales nicely once you start unlocking attachments. The big one is the 19" MFS Nightfall Suppressed Barrel at weapon level 43. That attachment does a lot without feeling gimmicky. You stay off the minimap, your damage range gets better, and close-range panic shots feel a bit less messy. It's the kind of unlock that changes the whole build, not just one stat on paper.

How to unlock the MK35 ISR for free

The free route is pretty straightforward. The weapon sits on Page 3 of the Season 3 Battle Pass as the High-Value Target reward. You don't need to buy anything to get it. Just earn Battle Pass tokens through normal play, claim the regular rewards on that page, and then grab the rifle. If you only log on for a couple of hours at night, it may take a few sessions, but it's not a brutal grind. The main mistake people make is bouncing between low-XP modes and wondering why progress feels slow. If your goal is this gun, stick to modes that keep score and reward activity.

Fastest ways to cut the grind down

If you want it sooner, there are paid shortcuts. BlackCell lets you jump ahead to Page 3 right away, which means instant access to the base version. There's also the Saku blueprint later in the pass for BlackCell owners, and store bundles will probably show up with a preset version too. Still, even with a blueprint, you've got to level the weapon yourself if you want the best attachments. For the free grind, objective modes are the smartest move by a mile. Hardpoint and Domination usually beat Team Deathmatch for XP, especially if you're actually capping and contesting. In Warzone, chaining Bounty and Secure Intel contracts works well. Throw in a double XP token and the whole thing moves a lot faster.

What to do after you unlock it

Once the MK35 ISR is in your loadout, the next step is simple: get it to level 43 as fast as you can and build around consistency. Don't overcomplicate it. Lean into the accuracy, hold smart angles, and let the weapon do what it's built to do. Headshots come naturally with this gun because it barely kicks, so camo progress tends to happen in the background while you play. If you're trying to speed that part up as well, some players mix in easier lobbies or even buy CoD BO7 Bot Lobby options between regular matches, then switch back once the setup is done. However you go about it, the MK35 ISR is worth the time because it's one of the most reliable rifles in Season 3.