SA K556 16" attachment in MW4
The SA K556 16" is a barrel attachment (“Light 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 +9% on the Han 86 (worse). No popular build that CODMunity lists uses it.
Community-reportedggranked and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the SA K556 16"
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, worse), horizontal recoil (moderate, worse), vertical gun kick (moderate, worse), horizontal gun kick (moderate, worse), crouch movement speed (moderate, better), ADS movement speed (small, better), ADS speed (small, better), and ADS out speed (small, better), and 6 more | |
| M4 | Assault Rifle | crouch movement speed (moderate, better), ADS movement speed (small, better), ADS speed (small, better), ADS out speed (small, better), strafe speed (small, better), movement speed (small, better), sprint speed (small, better), and firing movement speed (small, better), and 2 more |
What the SA K556 16" 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 | 45.7 | +9% (worse) |
| Horizontal recoil | 11.2 | 12.2 | +9% (worse) | |
| ADS movement speed | 2.47 m/s | 2.64 m/s | +7% (better) | |
| ADS speed | 250 ms | 235 ms | −6% (better) | |
| Movement speed | 4.67 m/s | 4.81 m/s | +3% (better) | |
| Sprint speed | 6.13 m/s | 6.31 m/s | +3% (better) | |
| Sprint to fire speed | 210 ms | 204 ms | −3% (better) | |
| M4 | ADS movement speed | 2.51 m/s | 2.69 m/s | +7% (better) |
| ADS speed | 240 ms | 226 ms | −6% (better) | |
| Movement speed | 4.70 m/s | 4.84 m/s | +3% (better) | |
| Sprint speed | 6.18 m/s | 6.37 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 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 movement speed | 2 | +7% | +7% | 2 better, 0 worse |
| ADS speed | 2 | −6% | −6% | 2 better, 0 worse |
| Movement speed | 2 | +3% | +3% | 2 better, 0 worse |
| Sprint speed | 2 | +3% | +3% | 2 better, 0 worse |
| Sprint to fire speed | 2 | −3% | −3% | 2 better, 0 worse |
| Horizontal recoil | 1 | +9% | +9% | 0 better, 1 worse |
| Vertical recoil | 1 | +9% | +9% | 0 better, 1 worse |
| Crouch movement speed | 2 | +8% | +8% | 2 better, 0 worse |
| ADS out speed | 2 | −6% | −6% | 2 better, 0 worse |
| Strafe speed | 2 | +4% | +4% | 2 better, 0 worse |
| Firing movement speed | 2 | +3% | +3% | 2 better, 0 worse |
| Tactical sprint speed | 2 | +2% | +2% | 2 better, 0 worse |
| Horizontal gun kick | 1 | +9% | +9% | 0 better, 1 worse |
| Vertical gun kick | 1 | +9% | +9% | 0 better, 1 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 (worse) is in the bottom quarter of 6 barrel attachments.
- M4: its small ADS movement speed change (better) is in the top quarter of 10 barrel attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the SA K556 16"
No popular build listed by CODMunity uses the SA K556 16". That says nothing about how it performs; most listed attachments are in no popular build.
Frequently asked questions
What does the SA K556 16" do in MW4?
CODMunity lists 24 stat changes for it across 2 weapons: 20 better and 4 worse. The largest is vertical recoil +9% on the Han 86 (worse).
Which weapons can use the SA K556 16"?
Community sites list Han 86 and M4. Activision has not published a compatibility list.
Is the SA K556 16" in a popular build?
No. None of the popular builds that CODMunity lists uses it.