XRK Herder 40 attachment in MW4
The XRK Herder 40 is a muzzle attachment (“Tactical Silencer”) that community sites list for 2 weapons: ISO Nightshade and VEL 46. CODMunity lists a stat change on 2 of them; the largest is ADS speed +7% on the ISO Nightshade (worse). It is in 4 popular builds that CODMunity lists.
Community-reportedDMZ Radar, ggranked, and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the XRK Herder 40
Activision publishes no compatibility list; 3 community sources report these 2 weapons. No weapon level is reported.
| Weapon | Class | Weapon level | Stats with a listed change |
|---|---|---|---|
| ISO Nightshade | SMG | ADS speed (small, worse) and ADS out speed (small, worse) | |
| VEL 46 | SMG | ADS speed (small, worse) and ADS out speed (small, worse) |
What the XRK Herder 40 changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| ISO Nightshade | ADS speed | 240 ms | 257 ms | +7% (worse) |
| VEL 46 | ADS speed | 230 ms | 246 ms | +7% (worse) |
Smaller changes are left out of the table: 1 other stat on the ISO Nightshade and 1 other stat on the VEL 46.
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 | +7% | +7% | 0 better, 2 worse |
| ADS out speed | 2 | +6% | +7% | 0 better, 2 worse |
How it ranks among muzzle attachments
Its largest change on each weapon, compared with the other muzzle attachments the source lists that stat for.
- ISO Nightshade: its small ADS speed change (worse) is in the bottom quarter of 5 muzzle attachments.
- VEL 46: its small ADS speed change (worse) is in the bottom quarter of 5 muzzle attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the XRK Herder 40
CODMunity lists 4 popular builds that use it, all for Multiplayer. The styles are Versatile and Mobility. The same builds also use barrel, underbarrel, stock, laser, rear grip, and magazine attachments.
| Weapon | Mode and style | Tier | Other attachments | Builder |
|---|---|---|---|---|
| VEL 46 | Multiplayer, Versatile | Absolute meta | Barrel: VB-46 Series 11, Underbarrel: FSS Fireline Grip, Stock: EXP U-Turn Stock, and Laser: XRK Clutch-LS | Open in the builder: VEL 46, Versatile |
| VEL 46 | Multiplayer, Versatile with Apex Attachment | Absolute meta | Barrel: VB-46 Series 11, Underbarrel: FSS Fireline Grip, Rear Grip: V46 R-Skel Grip, and Laser: XRK Clutch-LS | Open in the builder: VEL 46, Versatile |
| ISO Nightshade | Multiplayer, Versatile with Apex Attachment | Absolute meta | Underbarrel: FSS Fireline Grip, Magazine: 40 Round Mag, Rear Grip: Demo STP-1, and Stock: EXP G2-44 Stock | Open in the builder: ISO Nightshade, Versatile |
| ISO Nightshade | Multiplayer, Mobility | Contender | Underbarrel: FSS Fireline Grip, Magazine: 50 Round Drum Mag, Stock: No Stock, and Laser: Schlager VISIV-5 | Open in the builder: ISO Nightshade, Mobility |
Builds are community-reported and unverified.
Frequently asked questions
What does the XRK Herder 40 do in MW4?
CODMunity lists 4 stat changes for it across 2 weapons: 0 better and 4 worse. The largest is ADS speed +7% on the ISO Nightshade (worse).
Which weapons can use the XRK Herder 40?
Community sites list ISO Nightshade and VEL 46. Activision has not published a compatibility list.
Is the XRK Herder 40 in a popular build?
Yes. CODMunity lists it in 4 popular builds, on VEL 46 and ISO Nightshade.