16" Highmark Barrel attachment in MW4
The 16" Highmark Barrel is a barrel attachment (“Heavy Barrel”) that community sites list for one weapon: M4. CODMunity lists a stat change on 1 of them; the largest is ADS speed +13% on the M4 (worse). No popular build that CODMunity lists uses it.
Community-reportedDMZ Codex, ggranked, and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the 16" Highmark Barrel
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 |
|---|---|---|---|
| M4 | Assault Rifle | ADS speed (moderate, worse), vertical recoil (moderate, better), horizontal recoil (moderate, better), vertical gun kick (moderate, better), horizontal gun kick (moderate, better), ADS out speed (moderate, worse), bullet velocity (moderate, better), and ADS movement speed (small, worse), and 6 more |
What the 16" Highmark Barrel changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| M4 | ADS speed | 240 ms | 271 ms | +13% (worse) |
| Vertical recoil | 40.6 | 35.3 | −13% (better) | |
| Horizontal recoil | 17.1 | 14.9 | −13% (better) | |
| 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 | 4.61 m/s | −2% (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 M4.
How it ranks among barrel attachments
Its largest change on each weapon, compared with the other barrel attachments the source lists that stat for.
- M4: its moderate ADS speed change (worse) is the weakest of 11 barrel attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the 16" Highmark Barrel
No popular build listed by CODMunity uses the 16" Highmark Barrel. That says nothing about how it performs; most listed attachments are in no popular build.
Frequently asked questions
What does the 16" Highmark Barrel do in MW4?
CODMunity lists 14 stat changes for it across 1 weapon: 5 better and 9 worse. The largest is ADS speed +13% on the M4 (worse).
Which weapons can use the 16" Highmark Barrel?
Community sites list M4. Activision has not published a compatibility list.
Is the 16" Highmark Barrel in a popular build?
No. None of the popular builds that CODMunity lists uses it.