QFL-S4.5 attachment in MW4
The QFL-S4.5 is a laser attachment (“Laser sight”) that community sites list for 11 weapons: Han 86, M4, Kastov 762, Axion, and ISO Nightshade and 6 more. CODMunity lists a stat change on 11 of them; the largest is sprint to fire speed −19% on the Wz.55 Striga (better). It is in 2 popular builds that CODMunity lists.
Community-reportedDMZ Codex, DMZ Radar, wzranked, ggranked, and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the QFL-S4.5
Activision publishes no compatibility list; 5 community sources report these 11 weapons. No weapon level is reported.
| Weapon | Class | Weapon level | Stats with a listed change |
|---|---|---|---|
| Han 86 | Assault Rifle | sprint to fire speed (large, better), hip idle sway (large, better), and hip gun bob (large, better) | |
| M4 | Assault Rifle | sprint to fire speed (large, better), hip idle sway (large, better), and hip gun bob (large, better) | |
| Kastov 762 | Assault Rifle | sprint to fire speed (large, better), hip idle sway (large, better), and hip gun bob (large, better) | |
| Axion | Assault Rifle | sprint to fire speed (large, better), hip idle sway (large, better), and hip gun bob (large, better) | |
| ISO Nightshade | SMG | drop speed (large, worse) and sprint to fire speed (large, better) | |
| VEL 46 | SMG | drop speed (large, better), sprint to fire speed (large, better), raise speed (large, worse), hip idle sway (large, better), and hip gun bob (large, better) | |
| Wz.55 Striga | SMG | sprint to fire speed (large, better), hip idle sway (large, better), and hip gun bob (large, better) | |
| PPSh-41 | SMG | sprint to fire speed (large, better) | |
| X-58 Nyx | SMG | sprint to fire speed (large, better) | |
| Rezi 12 | Shotgun | sprint to fire speed (large, better) | |
| Type 73 | LMG | sprint to fire speed (large, better) |
What the QFL-S4.5 changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| Han 86 | Sprint to fire speed | 210 ms | 174 ms | −17% (better) |
| M4 | Sprint to fire speed | 210 ms | 174 ms | −17% (better) |
| Kastov 762 | Sprint to fire speed | 210 ms | 174 ms | −17% (better) |
| Axion | Sprint to fire speed | 210 ms | 174 ms | −17% (better) |
| ISO Nightshade | Sprint to fire speed | 110 ms | 91 ms | −17% (better) |
| VEL 46 | Sprint to fire speed | 110 ms | 91 ms | −17% (better) |
| Wz.55 Striga | Sprint to fire speed | 96 ms | 78 ms | −19% (better) |
| PPSh-41 | Sprint to fire speed | 110 ms | 91 ms | −17% (better) |
| X-58 Nyx | Sprint to fire speed | 110 ms | 91 ms | −17% (better) |
| Rezi 12 | Sprint to fire speed | 160 ms | 133 ms | −17% (better) |
| Type 73 | Sprint to fire speed | 245 ms | 203 ms | −17% (better) |
Smaller changes are left out of the table: 2 other stats on the Han 86, 2 other stats on the M4, 2 other stats on the Kastov 762, 2 other stats on the Axion, 1 other stat on the ISO Nightshade, 4 other stats on the VEL 46, and 2 other stats on the Wz.55 Striga.
Changes across weapons
The stats it changes on 11 weapons, with the lowest and highest change.
| Stat | Weapons | Lowest change | Highest change | Verdicts |
|---|---|---|---|---|
| Sprint to fire speed | 11 | −19% | −17% | 11 better, 0 worse |
| Hip gun bob | 6 | −15% | −15% | 6 better, 0 worse |
| Hip idle sway | 6 | −15% | −15% | 6 better, 0 worse |
| Drop speed | 2 | −21% | +40% | 1 better, 1 worse |
| Raise speed | 1 | +17% | +17% | 0 better, 1 worse |
How it ranks among laser attachments
Its largest change on each weapon, compared with the other laser attachments the source lists that stat for.
- Han 86: its large sprint to fire speed change (better) is the best of 2 laser attachments.
- M4: its large sprint to fire speed change (better) is the best of 4 laser attachments.
- Kastov 762: its large sprint to fire speed change (better) is the best of 2 laser attachments.
- Axion: its large sprint to fire speed change (better) is the best of 2 laser attachments.
- ISO Nightshade: its large sprint to fire speed change (better) is the best of 2 laser attachments.
- VEL 46: its large sprint to fire speed change (better) is the best of 2 laser attachments.
- Wz.55 Striga: its large sprint to fire speed change (better) is the best of 2 laser attachments.
- PPSh-41: its large sprint to fire speed change (better) is the best of 2 laser attachments.
Pros and cons the sources list
Text from the community sources, without numbers.
Pros
- Pro: Sprint-to-fire speed
- Pro: Hip recoil control
- Pro: Hip gun kick
- Pro: Hip-fire accuracy
Cons
- Con: Beam is visible to enemies at the hip
Popular builds that use the QFL-S4.5
CODMunity lists 2 popular builds that use it: 1 for Multiplayer and 1 for DMZ. The styles are Mobility and Close Range. The same builds also use muzzle, barrel, magazine, and rear grip attachments.
| Weapon | Mode and style | Tier | Other attachments | Builder |
|---|---|---|---|---|
| Wz.55 Striga | Multiplayer, Mobility with Apex Attachment | Very good | Muzzle: FTAC Silent Recon, Barrel: DS 9x18 Pro, Magazine: 50 Round Drum Mag, and Rear Grip: FTAC Guard5 | Open in the builder: Wz.55 Striga, Mobility |
| Wz.55 Striga | DMZ, Close Range with Apex Attachment | Not tiered | Muzzle: FTAC Silent Recon, Barrel: DS 9x18 Pro, Magazine: 50 Round Drum Mag, and Rear Grip: FTAC Guard5 | Open in the builder: Wz.55 Striga, Close Range |
Builds are community-reported and unverified.
Frequently asked questions
What does the QFL-S4.5 do in MW4?
CODMunity lists 26 stat changes for it across 11 weapons: 24 better and 2 worse. The largest is sprint to fire speed −19% on the Wz.55 Striga (better).
Which weapons can use the QFL-S4.5?
Community sites list Han 86, M4, Kastov 762, Axion, ISO Nightshade, VEL 46, Wz.55 Striga, PPSh-41, X-58 Nyx, Rezi 12, and Type 73. Activision has not published a compatibility list.
Is the QFL-S4.5 in a popular build?
Yes. CODMunity lists it in 2 popular builds, on Wz.55 Striga.