Usenko 900 BL-X attachment in MW4
The Usenko 900 BL-X is a muzzle attachment (“Custom Silencer”) that community sites list for one weapon: Astaroth .57. CODMunity lists a stat change on 1 of them; the largest is bullet velocity +17% on the Astaroth .57 (better). It is in 3 popular builds that CODMunity lists.
Community-reportedDMZ Radar, ggranked, and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the Usenko 900 BL-X
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 |
|---|---|---|---|
| Astaroth .57 | Sniper Rifle | bullet velocity (large, better), damage range (large, better), ADS out speed (small, worse), ADS speed (small, worse), vertical recoil (small, better), horizontal recoil (small, better), vertical gun kick (small, better), and horizontal gun kick (small, better), and 8 more |
What the Usenko 900 BL-X changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| Astaroth .57 | Bullet velocity | 620 m/s | 725 m/s | +17% (better) |
| Damage range | 100% | 117% | +17% (better) | |
| ADS speed | 603 ms | 627 ms | +4% (worse) | |
| Vertical recoil | 14.4 | 14.0 | −3% (better) | |
| Horizontal recoil | 4.1 | 4.0 | −3% (better) | |
| ADS movement speed | 1.04 m/s | 1.02 m/s | −2% (worse) | |
| Sprint to fire speed | 500 ms | 510 ms | +2% (worse) | |
| Movement speed | 4.04 m/s | 4.00 m/s | −1% (worse) | |
| Sprint speed | 5.47 m/s | 5.42 m/s | −1% (worse) |
Smaller changes are left out of the table: 7 other stats on the Astaroth .57.
How it ranks among muzzle attachments
Its largest change on each weapon, compared with the other muzzle attachments the source lists that stat for.
- Astaroth .57: its large bullet velocity 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 Usenko 900 BL-X
CODMunity lists 3 popular builds that use it: 1 for Multiplayer and 2 for DMZ. The styles are Apex Attachment and Sniper. The same builds also use barrel, rear grip, stock, and ammunition attachments.
| Weapon | Mode and style | Tier | Other attachments | Builder |
|---|---|---|---|---|
| Astaroth .57 | Multiplayer, Apex Attachment with Apex Attachment | Viable | Barrel: FTAC Harbinger 45", Rear Grip: FJX S-TAC Grip, Stock: Cronen Strand-BG Stock, and Ammunition: .57 Cal High Velocity | Open in the builder: Astaroth .57, Apex Attachment |
| Astaroth .57 | DMZ, Sniper | Not tiered | Barrel: FTAC Harbinger 45", Rear Grip: FJX S-TAC Grip, Stock: Cronen Strand-BG Stock, and Ammunition: .57 Cal High Velocity | Open in the builder: Astaroth .57, Sniper |
| Astaroth .57 | DMZ, Apex Attachment with Apex Attachment | Not tiered | Barrel: FTAC Harbinger 45", Rear Grip: FJX S-TAC Grip, Stock: Cronen Strand-BG Stock, and Ammunition: .57 Cal High Velocity | Open in the builder: Astaroth .57, Apex Attachment |
Builds are community-reported and unverified.
Frequently asked questions
What does the Usenko 900 BL-X do in MW4?
CODMunity lists 16 stat changes for it across 1 weapon: 6 better and 10 worse. The largest is bullet velocity +17% on the Astaroth .57 (better).
Which weapons can use the Usenko 900 BL-X?
Community sites list Astaroth .57. Activision has not published a compatibility list.
Is the Usenko 900 BL-X in a popular build?
Yes. CODMunity lists it in 3 popular builds, on Astaroth .57.