SA B40 Grip attachment in MW4
The SA B40 Grip is a rear grip attachment (“Assault Grip”) that community sites list for one weapon: Rezi 12. CODMunity lists a stat change on 1 of them; the largest is vertical recoil −6% on the Rezi 12 (better). No popular build that CODMunity lists uses it.
Community-reportedggranked and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the SA B40 Grip
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 | vertical recoil (small, better), horizontal recoil (small, better), vertical gun kick (small, better), horizontal gun kick (small, better), sprint to fire speed (small, worse), ADS speed (small, worse), and ADS out speed (small, worse) |
What the SA B40 Grip 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 | Vertical recoil | 98.5 | 92.6 | −6% (better) |
| Horizontal recoil | 17.4 | 16.4 | −6% (better) | |
| Sprint to fire speed | 160 ms | 168 ms | +5% (worse) | |
| ADS speed | 340 ms | 354 ms | +4% (worse) |
Smaller changes are left out of the table: 3 other stats on the Rezi 12.
How it ranks among rear grip attachments
Its largest change on each weapon, compared with the other rear grip attachments the source lists that stat for.
- Rezi 12: its small vertical recoil change (better) is the best of 3 rear grip attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the SA B40 Grip
No popular build listed by CODMunity uses the SA B40 Grip. That says nothing about how it performs; most listed attachments are in no popular build.
Frequently asked questions
What does the SA B40 Grip do in MW4?
CODMunity lists 7 stat changes for it across 1 weapon: 4 better and 3 worse. The largest is vertical recoil −6% on the Rezi 12 (better).
Which weapons can use the SA B40 Grip?
Community sites list Rezi 12. Activision has not published a compatibility list.
Is the SA B40 Grip in a popular build?
No. None of the popular builds that CODMunity lists uses it.