ZLR L48 Siege 13" attachment in MW4
The ZLR L48 Siege 13" is a barrel attachment (“Short Barrel”) that community sites list for one weapon: Rezi 12. CODMunity lists a stat change on 1 of them; the largest is bullet velocity −14% on the Rezi 12 (worse). No popular build that CODMunity lists uses it.
Community-reportedggranked and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the ZLR L48 Siege 13"
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 |
|---|---|---|---|
| Rezi 12 | Shotgun | bullet velocity (moderate, worse), vertical recoil (moderate, worse), horizontal recoil (moderate, worse), vertical gun kick (moderate, worse), horizontal gun kick (moderate, worse), ADS idle sway (moderate, better), hip idle sway (moderate, better), and ADS speed (moderate, better), and 10 more |
What the ZLR L48 Siege 13" changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| Rezi 12 | Bullet velocity | 340 m/s | 292 m/s | −14% (worse) |
| Vertical recoil | 98.5 | 108.4 | +10% (worse) | |
| Horizontal recoil | 17.4 | 19.1 | +10% (worse) | |
| ADS speed | 340 ms | 313 ms | −8% (better) | |
| Movement speed | 4.72 m/s | 5.00 m/s | +6% (better) | |
| Sprint to fire speed | 160 ms | 150 ms | −6% (better) | |
| ADS movement speed | 3.09 m/s | 3.15 m/s | +2% (better) | |
| Sprint speed | 6.26 m/s | 6.32 m/s | +1% (better) |
Smaller changes are left out of the table: 10 other stats on the Rezi 12.
How it ranks among barrel attachments
Its largest change on each weapon, compared with the other barrel attachments the source lists that stat for.
- Rezi 12: its moderate bullet velocity change (worse) is the weakest of 3 barrel attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the ZLR L48 Siege 13"
No popular build listed by CODMunity uses the ZLR L48 Siege 13". That says nothing about how it performs; most listed attachments are in no popular build.
Frequently asked questions
What does the ZLR L48 Siege 13" do in MW4?
CODMunity lists 18 stat changes for it across 1 weapon: 13 better and 5 worse. The largest is bullet velocity −14% on the Rezi 12 (worse).
Which weapons can use the ZLR L48 Siege 13"?
Community sites list Rezi 12. Activision has not published a compatibility list.
Is the ZLR L48 Siege 13" in a popular build?
No. None of the popular builds that CODMunity lists uses it.