MW4 Best Assault Rifle in the Beta: M4 or Kastov 762?
The M4 is the safest best assault rifle in the MW4 beta, while the Kastov 762 hits harder for confident aimers. Here's how to pick and level them fast.
The best assault rifle in the MW4 beta is the M4 for most players, with the Kastov 762 edging ahead only if your recoil control is strong. That's the short version. If you want the exact reasoning, the level requirements, and the fastest way to get both maxed before the beta window closes, keep reading — and if you'd rather skip the grind entirely, our MW4 weapon leveling boostfrom $4.99 can max these rifles for you while you're at work.
The M4 vs Kastov 762 debate is the single most common question I've seen since the beta went live on August 21. Both are strong. Both are early unlocks. But they reward completely different playstyles, and picking the wrong one wastes weapon XP you don't have time to waste in a two-weekend test.
The verdict: M4 for consistency, Kastov 762 for damage
Here's the one-liner: run the M4 until your aim justifies the Kastov.
The M4 is the all-rounder. It does not lean too hard into any one niche, but that is exactly what makes it so good, since it can handle close, mid, and even some longer-range fights without feeling awkward. Its recoil is manageable, its damage profile is dependable, and its flexibility makes it one of the easiest rifles to recommend. It's the safest pick in the game right now, and community pick-rate tracking backs that up — the M4 is sitting near the top of the AR charts with a reported 34% pick rate.
The Kastov 762 is the trade-up. The Kastov 762 remains one of the best high-damage rifles in the Beta. It hits harder than many of the more forgiving ARs, which makes it extremely threatening in medium-range duels. The catch? Its recoil is the main thing keeping it out of S-Tier. In the right hands, though, this can absolutely feel like a top-end weapon. It's a full-auto 7.62x39mm rifle built around high damage per shot, which means more stopping power at range with the trade-off of stronger kick.
The rule I give people is simple: shaky aim = M4, confident flick shots = Kastov.
M4 vs Kastov 762: side-by-side
| Factor | M4 | Kastov 762 |
|---|---|---|
| Unlock | Around Rank 9 (very early) | Rank 21 normally; usable early via Assault Default Loadout |
| Damage per shot | Solid, consistent | Higher, hits harder |
| Recoil | Manageable, forgiving | Stronger, punishes bad aim |
| Best range | Close to mid, flexible | Medium-range duels |
| Ideal player | Everyone, especially newcomers | Confident aimers |
| Weapon levels to max | Standard | 71 levels — one of the longest grinds |
One thing to note on unlocks: the Assault Default Loadout lets you use the Kastov 762 before its Rank 21 unlock, but using it through a Default Loadout does not unlock it for your own Custom Loadouts or give you early normal Gunsmith access. So you can test the Kastov early, but you can't tune it until you actually hit the rank. If you own the Vault Edition, you can immediately use the Kastov 762 through the Signature Weapon Collection, even though its standard Player Rank unlock is Rank 21.
Why the meta isn't fully settled yet
Be honest with yourself here — nobody has a locked-in meta this early. The MW4 beta gives you up to 19 weapons across nine classes, unlocked as you level, and the full roster is still being tested by the community in its opening days. Nobody being straight with you can hand you a settled, proven meta ranking yet, because weapon balance, attachment availability, and final beta tuning all shift as the test runs.
The bigger shift is under the hood. MW4 introduces Ballistic Authority, a new gunplay system that removes hipfire bloom entirely, so bullets go exactly where you aim. That change quietly favors high-damage rifles like the Kastov, because you're rewarded for controlling recoil instead of being punished by random spread. It's part of why the AR class as a whole feels so strong this beta.
Worth flagging: the ISO Nightshade SMG is arguably the single best gun in the beta right now, so if you're not married to the AR class, that's your other top pick. But for pure assault rifle players, M4 and Kastov are the two to invest in.
M4 pros and cons
Since the M4 is the pick I'd hand 90% of players, here's the honest breakdown:
Pros
- Unlocks extremely early (around Rank 9) — you can run it almost immediately
- Forgiving recoil that works across every 6v6 mode
- Beginner-friendly; it does not need to be fully equipped with attachments to feel useful
- Highest pick rate in the beta, so it's map-agnostic and reliable
Cons
- Lower raw damage than the Kastov at range
- Doesn't dominate any single range — it's a jack-of-all-trades
- "Safe" pick means it won't out-duel a well-controlled Kastov head-to-head
Don't obsess over raw TTK. A theoretically faster weapon isn't useful if you can't control it. A rifle with slightly slower damage output but excellent accuracy will win you more fights — that's exactly why the M4 outperforms the Kastov for most people.
Related questions
What attachments should I run on the M4? Build around ADS and sprint-to-fire speed, then add recoil control. A clean mini reflex like the Slimline Elite keeps the sight picture uncluttered — it gives the M4 a clean sight picture without adding the visual bulk of a larger optic. If you're comfortable with the iron sight, you can swap it for an Apex attachment instead. Explosive damage is strong in this beta, so Bomb Squad is a smart perk pick.
Is the Kastov 762 worth leveling in the beta? Only if you plan to lean into it. The Kastov 762 takes 71 Weapon Levels to fully max — one of the longest grinds in the beta — so committing to it means committing hard. If your aim is solid and you want that mid-range damage, go for it; otherwise the M4 gives you more return for less XP.
Should I level one gun or spread XP across several? Focus. The beta is a short window, and Apex Attachments are earned by fully leveling a single supported weapon. Committing to one AR and one SMG for their Apex Attachments beats spreading thin. If you want the full breakdown, see our MW4 Apex Attachments guide.
Does beta weapon progress carry over to the full game? This is worth checking before you sink hours in — we cover exactly what transfers in our beta progress carry-over guide.
The bottom line
Maxing the M4 or Kastov 762 to unlock every attachment and their Apex reward is a real grind — the Kastov alone is 71 weapon levels, and the beta is only open across two weekends. If you'd rather spend that limited window actually playing instead of farming XP, our MW4 weapon leveling servicefrom $4.99 can level these rifles for you on your own account, no password required.
