Mugi Hwando-Z3 521mm attachment in MW4
The Mugi Hwando-Z3 521mm is a barrel attachment (“Light Barrel”) that community sites list for one weapon: Hyeon Burst. CODMunity lists a stat change on 1 of them; the largest is ADS movement speed +8% on the Hyeon Burst (better). No popular build that CODMunity lists uses it.
Community-reportedwzranked, ggranked, and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the Mugi Hwando-Z3 521mm
Activision publishes no compatibility list; 3 community sources report this weapon. No weapon level is reported.
| Weapon | Class | Weapon level | Stats with a listed change |
|---|---|---|---|
| Hyeon Burst | Assault Rifle | ADS movement speed (moderate, better), crouch movement speed (moderate, better), vertical recoil (small, worse), horizontal recoil (small, worse), vertical gun kick (small, worse), horizontal gun kick (small, worse), ADS speed (small, better), and ADS out speed (small, better), and 6 more |
What the Mugi Hwando-Z3 521mm changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| Hyeon Burst | ADS movement speed | 2.36 m/s | 2.55 m/s | +8% (better) |
| Vertical recoil | 38.3 | 41.0 | +7% (worse) | |
| Horizontal recoil | 16.4 | 17.5 | +7% (worse) | |
| ADS speed | 275 ms | 259 ms | −6% (better) | |
| Movement speed | 4.58 m/s | 4.72 m/s | +3% (better) | |
| Sprint speed | 6.07 m/s | 6.25 m/s | +3% (better) | |
| Sprint to fire speed | 210 ms | 204 ms | −3% (better) |
Smaller changes are left out of the table: 7 other stats on the Hyeon Burst.
How it ranks among barrel attachments
Its largest change on each weapon, compared with the other barrel attachments the source lists that stat for.
- Hyeon Burst: its moderate ADS movement speed change (better) is the best of 4 barrel attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the Mugi Hwando-Z3 521mm
No popular build listed by CODMunity uses the Mugi Hwando-Z3 521mm. That says nothing about how it performs; most listed attachments are in no popular build.
Frequently asked questions
What does the Mugi Hwando-Z3 521mm do in MW4?
CODMunity lists 14 stat changes for it across 1 weapon: 10 better and 4 worse. The largest is ADS movement speed +8% on the Hyeon Burst (better).
Which weapons can use the Mugi Hwando-Z3 521mm?
Community sites list Hyeon Burst. Activision has not published a compatibility list.
Is the Mugi Hwando-Z3 521mm in a popular build?
No. None of the popular builds that CODMunity lists uses it.