Hanbit RK8 406mm attachment in MW4
The Hanbit RK8 406mm is a barrel attachment (“Heavy Barrel”) that community sites list for 2 weapons: Han 86 and M4. CODMunity lists a stat change on 2 of them; the largest is vertical recoil −14% on the Han 86 (better). No popular build that CODMunity lists uses it.
Community-reportedggranked and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the Hanbit RK8 406mm
Activision publishes no compatibility list; 2 community sources report these 2 weapons. No weapon level is reported.
| Weapon | Class | Weapon level | Stats with a listed change |
|---|---|---|---|
| Han 86 | Assault Rifle | vertical recoil (moderate, better), horizontal recoil (moderate, better), vertical gun kick (moderate, better), horizontal gun kick (moderate, better), ADS speed (moderate, worse), ADS out speed (moderate, worse), bullet velocity (moderate, better), and ADS movement speed (small, worse), and 6 more | |
| M4 | Assault Rifle | ADS speed (moderate, worse), ADS out speed (moderate, worse), bullet velocity (moderate, better), ADS movement speed (small, worse), movement speed (small, worse), crouch movement speed (small, worse), strafe speed (small, worse), and sprint speed (minor, worse), and 2 more |
What the Hanbit RK8 406mm changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| Han 86 | Vertical recoil | 41.9 | 36.0 | −14% (better) |
| Horizontal recoil | 11.2 | 9.6 | −14% (better) | |
| ADS speed | 250 ms | 280 ms | +12% (worse) | |
| Bullet velocity | 615 m/s | 664 m/s | +8% (better) | |
| ADS movement speed | 2.47 m/s | 2.37 m/s | −4% (worse) | |
| Movement speed | 4.67 m/s | 4.53 m/s | −3% (worse) | |
| Sprint speed | 6.13 m/s | 6.01 m/s | −2% (worse) | |
| M4 | ADS speed | 240 ms | 269 ms | +12% (worse) |
| Bullet velocity | 590 m/s | 637 m/s | +8% (better) | |
| ADS movement speed | 2.51 m/s | 2.41 m/s | −4% (worse) | |
| Movement speed | 4.70 m/s | 4.56 m/s | −3% (worse) | |
| Sprint speed | 6.18 m/s | 6.06 m/s | −2% (worse) |
Smaller changes are left out of the table: 7 other stats on the Han 86 and 5 other stats on the M4.
Changes across weapons
The stats it changes on 2 weapons, with the lowest and highest change.
| Stat | Weapons | Lowest change | Highest change | Verdicts |
|---|---|---|---|---|
| ADS speed | 2 | +12% | +12% | 0 better, 2 worse |
| Bullet velocity | 2 | +8% | +8% | 2 better, 0 worse |
| ADS movement speed | 2 | −4% | −4% | 0 better, 2 worse |
| Movement speed | 2 | −3% | −3% | 0 better, 2 worse |
| Sprint speed | 2 | −2% | −2% | 0 better, 2 worse |
| Horizontal recoil | 1 | −14% | −14% | 1 better, 0 worse |
| Vertical recoil | 1 | −14% | −14% | 1 better, 0 worse |
| ADS out speed | 2 | +9% | +9% | 0 better, 2 worse |
| Crouch movement speed | 2 | −3% | −3% | 0 better, 2 worse |
| Strafe speed | 2 | −3% | −3% | 0 better, 2 worse |
| Firing movement speed | 2 | −2% | −2% | 0 better, 2 worse |
| Tactical sprint speed | 2 | −2% | −2% | 0 better, 2 worse |
| Horizontal gun kick | 1 | −14% | −14% | 1 better, 0 worse |
| Vertical gun kick | 1 | −14% | −14% | 1 better, 0 worse |
How it ranks among barrel attachments
Its largest change on each weapon, compared with the other barrel attachments the source lists that stat for.
- Han 86: its moderate vertical recoil change (better) is the best of 6 barrel attachments.
- M4: its moderate ADS speed change (worse) is in the bottom quarter of 11 barrel attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the Hanbit RK8 406mm
No popular build listed by CODMunity uses the Hanbit RK8 406mm. That says nothing about how it performs; most listed attachments are in no popular build.
Frequently asked questions
What does the Hanbit RK8 406mm do in MW4?
CODMunity lists 24 stat changes for it across 2 weapons: 6 better and 18 worse. The largest is vertical recoil −14% on the Han 86 (better).
Which weapons can use the Hanbit RK8 406mm?
Community sites list Han 86 and M4. Activision has not published a compatibility list.
Is the Hanbit RK8 406mm in a popular build?
No. None of the popular builds that CODMunity lists uses it.