RV-B v2 Barrel attachment in MW4
The RV-B v2 Barrel is a barrel attachment (“Light Barrel”) that community sites list for one weapon: VEL 46. CODMunity lists a stat change on 1 of them; the largest is vertical recoil +9% on the VEL 46 (worse). It is in 1 popular build that CODMunity lists.
Community-reportedggranked and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the RV-B v2 Barrel
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 |
|---|---|---|---|
| VEL 46 | SMG | vertical recoil (moderate, worse), horizontal recoil (moderate, worse), vertical gun kick (moderate, worse), horizontal gun kick (moderate, worse), crouch movement speed (moderate, better), ADS movement speed (small, better), ADS speed (small, better), and ADS out speed (small, better), and 6 more |
What the RV-B v2 Barrel changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| VEL 46 | Vertical recoil | 39.6 | 43.2 | +9% (worse) |
| Horizontal recoil | 12.5 | 13.6 | +9% (worse) | |
| ADS movement speed | 3.22 m/s | 3.41 m/s | +6% (better) | |
| ADS speed | 230 ms | 216 ms | −6% (better) | |
| Movement speed | 4.77 m/s | 4.91 m/s | +3% (better) | |
| Sprint speed | 6.26 m/s | 6.45 m/s | +3% (better) | |
| Sprint to fire speed | 110 ms | 107 ms | −3% (better) |
Smaller changes are left out of the table: 7 other stats on the VEL 46.
How it ranks among barrel attachments
Its largest change on each weapon, compared with the other barrel attachments the source lists that stat for.
- VEL 46: its moderate vertical recoil 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 RV-B v2 Barrel
CODMunity lists 1 popular build that use it, all for Multiplayer. The styles are Mobility. The same builds also use muzzle, rear grip, stock, and laser attachments.
| Weapon | Mode and style | Tier | Other attachments | Builder |
|---|---|---|---|---|
| VEL 46 | Multiplayer, Mobility | Meta | Muzzle: FSS Crackdown, Rear Grip: Sakin Rubber Grip, Stock: EXP U-Turn Stock, and Laser: Schlager VISIV-5 | Open in the builder: VEL 46, Mobility |
Builds are community-reported and unverified.
Frequently asked questions
What does the RV-B v2 Barrel do in MW4?
CODMunity lists 14 stat changes for it across 1 weapon: 10 better and 4 worse. The largest is vertical recoil +9% on the VEL 46 (worse).
Which weapons can use the RV-B v2 Barrel?
Community sites list VEL 46. Activision has not published a compatibility list.
Is the RV-B v2 Barrel in a popular build?
Yes. CODMunity lists it in 1 popular build, on VEL 46.