Mugi D40 Stock attachment in MW4
The Mugi D40 Stock is a stock attachment (“Light Stock”) that community sites list for one weapon: Warlord. CODMunity lists a stat change on 1 of them; the largest is ADS movement speed +10% on the Warlord (better). 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 Mugi D40 Stock
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 |
|---|---|---|---|
| Warlord | Shotgun | ADS gun bob (large, worse), ADS idle sway (large, worse), ADS movement speed (moderate, better), crouch movement speed (small, better), movement speed (small, better), strafe speed (small, better), firing movement speed (small, better), and flinch received (small, worse), and 2 more |
What the Mugi D40 Stock changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| Warlord | ADS movement speed | 2.93 m/s | 3.22 m/s | +10% (better) |
| Movement speed | 4.55 m/s | 4.73 m/s | +4% (better) | |
| Sprint speed | 6.11 m/s | 6.23 m/s | +2% (better) |
Smaller changes are left out of the table: 7 other stats on the Warlord.
How it ranks among stock attachments
Its largest change on each weapon, compared with the other stock attachments the source lists that stat for.
- Warlord: its moderate ADS movement speed change (better) is the only one listed.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the Mugi D40 Stock
CODMunity lists 4 popular builds that use it: 2 for Multiplayer and 2 for DMZ. The styles are Mobility and Close Range. The same builds also use bolt, muzzle, barrel, rear grip, laser, and underbarrel attachments.
| Weapon | Mode and style | Tier | Other attachments | Builder |
|---|---|---|---|---|
| Warlord | Multiplayer, Mobility with Apex Attachment | Very good | Bolt: L-Strike Bolt, Muzzle: Mugi Kalnal-T 12G, Barrel: Mugi Chujeok-800, and Rear Grip: DV3-Sinsok Grip | Open in the builder: Warlord, Mobility |
| Warlord | Multiplayer, Mobility | Very good | Muzzle: Mugi Kalnal-T 12G, Barrel: Mugi Chujeok-800, Rear Grip: DV3-Sinsok Grip, and Laser: Expedite Intra-5b | Open in the builder: Warlord, Mobility |
| Warlord | DMZ, Close Range with Apex Attachment | Not tiered | Muzzle: Mugi Kalnal-H 12G, Barrel: NK Gangta-12G, Underbarrel: MIRE-50 Tac Grip, and Rear Grip: DV3-Sinsok Grip | Open in the builder: Warlord, Close Range |
| Warlord | DMZ, Close Range | Not tiered | Bolt: L-Strike Bolt, Muzzle: Mugi Kalnal-H 12G, Barrel: NK Gangta-12G, and Laser: Expedite Intra-5b | Open in the builder: Warlord, Close Range |
Builds are community-reported and unverified.
Frequently asked questions
What does the Mugi D40 Stock do in MW4?
CODMunity lists 10 stat changes for it across 1 weapon: 7 better and 3 worse. The largest is ADS movement speed +10% on the Warlord (better).
Which weapons can use the Mugi D40 Stock?
Community sites list Warlord. Activision has not published a compatibility list.
Is the Mugi D40 Stock in a popular build?
Yes. CODMunity lists it in 4 popular builds, on Warlord.