LX3-V 409mm attachment in MW4
The LX3-V 409mm is a barrel attachment (“Long Barrel”) that community sites list for one weapon: X-58 Nyx. CODMunity lists a stat change on 1 of them; the largest is damage range +22% on the X-58 Nyx (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 LX3-V 409mm
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 |
|---|---|---|---|
| X-58 Nyx | SMG | damage range (large, better), bullet velocity (large, better), ADS speed (moderate, worse), ADS out speed (moderate, worse), sprint to fire speed (moderate, worse), ADS idle sway (moderate, worse), hip idle sway (moderate, worse), and vertical recoil (small, better), and 10 more |
What the LX3-V 409mm changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| X-58 Nyx | Damage range | 100% | 122% | +22% (better) |
| Bullet velocity | 450 m/s | 540 m/s | +20% (better) | |
| ADS speed | 255 ms | 286 ms | +12% (worse) | |
| Sprint to fire speed | 110 ms | 120 ms | +9% (worse) | |
| Vertical recoil | 36.0 | 34.6 | −4% (better) | |
| Horizontal recoil | 10.5 | 10.1 | −4% (better) | |
| Movement speed | 4.74 m/s | 4.65 m/s | −2% (worse) | |
| ADS movement speed | 3.26 m/s | 3.19 m/s | −2% (worse) | |
| Sprint speed | 6.27 m/s | 6.21 m/s | −1% (worse) |
Smaller changes are left out of the table: 9 other stats on the X-58 Nyx.
How it ranks among barrel attachments
Its largest change on each weapon, compared with the other barrel attachments the source lists that stat for.
- X-58 Nyx: its large damage range change (better) is the best of 2 barrel attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the LX3-V 409mm
CODMunity lists 1 popular build that use it, all for DMZ. The styles are Close Range. The same builds also use underbarrel, magazine, stock, and laser attachments.
| Weapon | Mode and style | Tier | Other attachments | Builder |
|---|---|---|---|---|
| X-58 Nyx | DMZ, Close Range | Not tiered | Underbarrel: FSS Fireline Grip, Magazine: 60 Round Mag, Stock: No Stock, and Laser: Schlager VISIV-5 | Open in the builder: X-58 Nyx, Close Range |
Builds are community-reported and unverified.
Frequently asked questions
What does the LX3-V 409mm do in MW4?
CODMunity lists 18 stat changes for it across 1 weapon: 6 better and 12 worse. The largest is damage range +22% on the X-58 Nyx (better).
Which weapons can use the LX3-V 409mm?
Community sites list X-58 Nyx. Activision has not published a compatibility list.
Is the LX3-V 409mm in a popular build?
Yes. CODMunity lists it in 1 popular build, on X-58 Nyx.