FJX Sypher 27" attachment in MW4
The FJX Sypher 27" is a barrel attachment (“Heavy Long Barrel”) that community sites list for one weapon: Cronen Squall. CODMunity lists a stat change on 1 of them; the largest is damage range +18% on the Cronen Squall (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 FJX Sypher 27"
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 |
|---|---|---|---|
| Cronen Squall | Assault Rifle | damage range (large, better), bullet velocity (large, better), ADS speed (moderate, worse), ADS out speed (moderate, worse), vertical recoil (moderate, better), horizontal recoil (moderate, better), vertical gun kick (moderate, better), and horizontal gun kick (moderate, better), and 11 more |
What the FJX Sypher 27" changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| Cronen Squall | Damage range | 100% | 118% | +18% (better) |
| Bullet velocity | 660 m/s | 766 m/s | +16% (better) | |
| ADS speed | 305 ms | 339 ms | +11% (worse) | |
| Vertical recoil | 50.4 | 45.4 | −10% (better) | |
| Horizontal recoil | 6.3 | 5.7 | −10% (better) | |
| ADS movement speed | 2.24 m/s | 2.11 m/s | −6% (worse) | |
| Sprint to fire speed | 210 ms | 223 ms | +6% (worse) | |
| Movement speed | 4.55 m/s | 4.37 m/s | −4% (worse) | |
| Sprint speed | 6.07 m/s | 5.89 m/s | −3% (worse) |
Smaller changes are left out of the table: 10 other stats on the Cronen Squall.
How it ranks among barrel attachments
Its largest change on each weapon, compared with the other barrel attachments the source lists that stat for.
- Cronen Squall: 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 FJX Sypher 27"
CODMunity lists 1 popular build that use it, all for DMZ. The styles are Long Range. The same builds also use optic, muzzle, and magazine attachments.
| Weapon | Mode and style | Tier | Other attachments | Builder |
|---|---|---|---|---|
| Cronen Squall | DMZ, Long Range with Apex Attachment | Not tiered | Optic: KV Corsac Holo, Muzzle: EXP Undertow Gen. 2, and Magazine: 60 Round Drum | Open in the builder: Cronen Squall, Long Range |
Builds are community-reported and unverified.
Frequently asked questions
What does the FJX Sypher 27" do in MW4?
CODMunity lists 19 stat changes for it across 1 weapon: 6 better and 13 worse. The largest is damage range +18% on the Cronen Squall (better).
Which weapons can use the FJX Sypher 27"?
Community sites list Cronen Squall. Activision has not published a compatibility list.
Is the FJX Sypher 27" in a popular build?
Yes. CODMunity lists it in 1 popular build, on Cronen Squall.