EXP .388 XL 24.5" attachment in MW4
The EXP .388 XL 24.5" is a barrel attachment (“Long Barrel”) that community sites list for one weapon: APOC-338. CODMunity lists a stat change on 1 of them; the largest is damage range +26% on the APOC-338 (better). No popular build that CODMunity lists uses it.
Community-reportedggranked and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the EXP .388 XL 24.5"
Activision publishes no compatibility list; 2 community sources report this weapon. No weapon level is reported.
| Weapon | Class | Weapon level | Stats with a listed change |
|---|---|---|---|
| APOC-338 | LMG | damage range (large, better), bullet velocity (large, better), ADS idle sway (moderate, worse), hip idle sway (moderate, worse), sprint to fire speed (small, worse), ADS movement speed (small, worse), ADS speed (small, worse), and crouch movement speed (small, worse), and 10 more |
What the EXP .388 XL 24.5" changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| APOC-338 | Damage range | 100% | 126% | +26% (better) |
| Bullet velocity | 730 m/s | 876 m/s | +20% (better) | |
| Sprint to fire speed | 250 ms | 265 ms | +6% (worse) | |
| ADS movement speed | 1.51 m/s | 1.43 m/s | −5% (worse) | |
| ADS speed | 510 ms | 536 ms | +5% (worse) | |
| Vertical recoil | 57.6 | 55.3 | −4% (better) | |
| Horizontal recoil | 31.3 | 30.0 | −4% (better) | |
| Movement speed | 4.05 m/s | 3.93 m/s | −3% (worse) | |
| Sprint speed | 5.57 m/s | 5.51 m/s | −1% (worse) |
Smaller changes are left out of the table: 9 other stats on the APOC-338.
How it ranks among barrel attachments
Its largest change on each weapon, compared with the other barrel attachments the source lists that stat for.
- APOC-338: 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 EXP .388 XL 24.5"
No popular build listed by CODMunity uses the EXP .388 XL 24.5". That says nothing about how it performs; most listed attachments are in no popular build.
Frequently asked questions
What does the EXP .388 XL 24.5" do in MW4?
CODMunity lists 18 stat changes for it across 1 weapon: 6 better and 12 worse. The largest is damage range +26% on the APOC-338 (better).
Which weapons can use the EXP .388 XL 24.5"?
Community sites list APOC-338. Activision has not published a compatibility list.
Is the EXP .388 XL 24.5" in a popular build?
No. None of the popular builds that CODMunity lists uses it.