Haebang 635R-7 attachment in MW4
The Haebang 635R-7 is a barrel attachment (“Long Barrel”) that community sites list for one weapon: Rezi 12. CODMunity lists a stat change on 1 of them; the largest is magazine size +33% on the Rezi 12 (better). It is in 5 popular builds that CODMunity lists.
Community-reportedggranked and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the Haebang 635R-7
Activision publishes no compatibility list; 2 community sources report this weapon. No weapon level is reported.
| Weapon | Class | Weapon level | Stats with a listed change |
|---|---|---|---|
| Rezi 12 | Shotgun | magazine size (large, better), total rounds (large, better), reload time (large, worse), bullet velocity (large, better), ADS speed (moderate, worse), ADS out speed (moderate, worse), sprint to fire speed (moderate, worse), and ADS idle sway (moderate, worse), and 12 more |
What the Haebang 635R-7 changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| Rezi 12 | Magazine size | 6 rounds | 8 rounds | +33% (better) |
| Reload time | 6131 ms | 7786 ms | +27% (worse) | |
| Bullet velocity | 340 m/s | 408 m/s | +20% (better) | |
| ADS speed | 340 ms | 371 ms | +9% (worse) | |
| Sprint to fire speed | 160 ms | 174 ms | +9% (worse) | |
| Vertical recoil | 98.5 | 94.6 | −4% (better) | |
| Horizontal recoil | 17.4 | 16.7 | −4% (better) | |
| Movement speed | 4.72 m/s | 4.63 m/s | −2% (worse) | |
| ADS movement speed | 3.09 m/s | 3.03 m/s | −2% (worse) | |
| Sprint speed | 6.26 m/s | 6.20 m/s | −1% (worse) |
Smaller changes are left out of the table: 10 other stats on the Rezi 12.
How it ranks among barrel attachments
Its largest change on each weapon, compared with the other barrel attachments the source lists that stat for.
- Rezi 12: its large magazine size change (better) is the weakest of 3 barrel attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the Haebang 635R-7
CODMunity lists 5 popular builds that use it: 4 for Multiplayer and 1 for DMZ. The styles are Mobility, Versatile, and Close Range. The same builds also use bolt, muzzle, rear grip, stock, laser, guard, and underbarrel attachments.
| Weapon | Mode and style | Tier | Other attachments | Builder |
|---|---|---|---|---|
| Rezi 12 | Multiplayer, Mobility | Very good | Bolt: ZLR Competition-B6, Muzzle: FTAC LTS-707, Rear Grip: XRK Bygone-39, and Stock: No Stock | Open in the builder: Rezi 12, Mobility |
| Rezi 12 | Multiplayer, Versatile | Very good | Bolt: ZLR Competition-B6, Muzzle: Sakin Omega 13, Stock: ZLR TAC12 Pro, and Laser: XRK Clutch-LS | Open in the builder: Rezi 12, Versatile |
| Rezi 12 | Multiplayer, Versatile with Apex Attachment | Very good | Muzzle: FTAC LTS-707, Guard: Demo Service-12G, Rear Grip: XRK Bygone-39, and Stock: ZLR TAC12 Pro | Open in the builder: Rezi 12, Versatile |
| Rezi 12 | Multiplayer, Mobility with Apex Attachment | Very good | Muzzle: FTAC LTS-707, Guard: Demo Service-12G, Rear Grip: XRK Bygone-39, and Stock: No Stock | Open in the builder: Rezi 12, Mobility |
| Rezi 12 | DMZ, Close Range | Not tiered | Bolt: XRK Quad-80, Muzzle: EXP Firelite 12, Underbarrel: FSS Fireline Grip, and Stock: No Stock | Open in the builder: Rezi 12, Close Range |
Builds are community-reported and unverified.
Frequently asked questions
What does the Haebang 635R-7 do in MW4?
CODMunity lists 20 stat changes for it across 1 weapon: 7 better and 13 worse. The largest is magazine size +33% on the Rezi 12 (better).
Which weapons can use the Haebang 635R-7?
Community sites list Rezi 12. Activision has not published a compatibility list.
Is the Haebang 635R-7 in a popular build?
Yes. CODMunity lists it in 5 popular builds, on Rezi 12.