Rockfall-900 Barrel attachment in MW4
The Rockfall-900 Barrel is a barrel attachment (“Heavy Long Barrel”) that community sites list for one weapon: Oden. CODMunity lists a stat change on 1 of them; the largest is damage range +16% on the Oden (better). It is in 1 popular build that CODMunity lists.
Community-reportedDMZ Radar, ggranked, and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the Rockfall-900 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 |
|---|---|---|---|
| Oden | Assault Rifle | damage range (large, better), bullet velocity (large, better), vertical recoil (moderate, better), horizontal recoil (moderate, better), vertical gun kick (moderate, better), horizontal gun kick (moderate, better), ADS speed (moderate, worse), and ADS out speed (moderate, worse), and 11 more |
What the Rockfall-900 Barrel changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| Oden | Damage range | 100% | 116% | +16% (better) |
| Bullet velocity | 690 m/s | 793 m/s | +15% (better) | |
| Vertical recoil | 49.4 | 44.5 | −10% (better) | |
| Horizontal recoil | 15.2 | 13.7 | −10% (better) | |
| ADS speed | 320 ms | 349 ms | +9% (worse) | |
| Sprint to fire speed | 210 ms | 229 ms | +9% (worse) | |
| ADS movement speed | 2.18 m/s | 2.03 m/s | −7% (worse) | |
| Movement speed | 4.46 m/s | 4.28 m/s | −4% (worse) | |
| Sprint speed | 6.03 m/s | 5.85 m/s | −3% (worse) |
Smaller changes are left out of the table: 10 other stats on the Oden.
How it ranks among barrel attachments
Its largest change on each weapon, compared with the other barrel attachments the source lists that stat for.
- Oden: its large damage range change (better) is in the lower half of 3 barrel attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the Rockfall-900 Barrel
CODMunity lists 1 popular build that use it, all for DMZ. The styles are Long Range. The same builds also use optic, muzzle, underbarrel, and magazine attachments.
| Weapon | Mode and style | Tier | Other attachments | Builder |
|---|---|---|---|---|
| Oden | DMZ, Long Range | Not tiered | Optic: KV Corsac Holo, Muzzle: TV Multical-77, Underbarrel: FSS Fireline Grip, and Magazine: 30 Round Mag | Open in the builder: Oden, Long Range |
Builds are community-reported and unverified.
Frequently asked questions
What does the Rockfall-900 Barrel do in MW4?
CODMunity lists 19 stat changes for it across 1 weapon: 6 better and 13 worse. The largest is damage range +16% on the Oden (better).
Which weapons can use the Rockfall-900 Barrel?
Community sites list Oden. Activision has not published a compatibility list.
Is the Rockfall-900 Barrel in a popular build?
Yes. CODMunity lists it in 1 popular build, on Oden.