The Rezi 12 is one of just two shotguns available in Modern Warfare 4 at launch, representing the best of a very underrepresented category. It’s the go-to choice for anyone wanting unstoppable power up close, but what’s the best build to run on this weapon? It’s a little complex, as it has some unique mechanics, some of which are locked behind the Apex variant of the weapon.
In this guide, I’m going to help you learn the best Rezi 12 loadout in Modern Warfare 4, so you can sprint around the map blasting enemies away with reckless abandon. It’s fast, accurate, and moves like a dream, but you’ll need to be pretty close for it to be effective.
Rezi 12 – Best Attachments and Build
The Rezi 12 has fantastic stopping power, as you might imagine a shotgun would, but it falls prey to that age-old Call of Duty problem of immense drop-off in terms of range. It’s weak in that respect, but if you can close the distance with this Rezi 12 loadout, you’ll be screaming through the kills.
Here are the best attachments for your Rezi 12 in Modern Warfare 4:
- ZLR L48 SIEGE 13″ Barrel
- TA RIBCAGE GEN. 1 Compensator
- MIRE-50 TAC Grip
- ZLR TAC12 PRO Stock
- Your choice of laser or torch
This is a stubbier shotgun that has awful range but incredible maneuverability. You’ll be nigh unstoppable with this thing. If you want more stopping power, add slugs rather than buckshot, but that is basically the only change you might need to make.

If you’re going to run around with the shotgun, I’d recommend pairing it with the meta perks. That means Ninja (Perk 1) or Quick Fix (Perk 1), Bomb Squad (Perk 2) or Fast Hands (Perk 2), and Battle Hardened (Perk 3) or Blood Rush (Perk 3).
Let us know on the Insider Gaming Discord server if you’ve found better attachments for the M4 in Modern Warfare 4.
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