Bruen R12 Gen. 4 attachment in MW4
The Bruen R12 Gen. 4 is a muzzle attachment (“Horizontal Comp”) that community sites list for 3 weapons: Patriot XMR, MAR-9, and Oris 8.6. CODMunity lists a stat change on 3 of them; the largest is horizontal recoil −25% on the Patriot XMR (better). No popular build that CODMunity lists uses it.
Community-reportedggranked and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the Bruen R12 Gen. 4
Activision publishes no compatibility list; 2 community sources report these 3 weapons. No weapon level is reported.
| Weapon | Class | Weapon level | Stats with a listed change |
|---|---|---|---|
| Patriot XMR | Assault Rifle | horizontal gun kick (large, better), horizontal recoil (large, better), ADS speed (small, worse), and ADS out speed (small, worse) | |
| MAR-9 | Marksman Rifle | horizontal gun kick (large, better), horizontal recoil (large, better), ADS speed (small, worse), and ADS out speed (small, worse) | |
| Oris 8.6 | Marksman Rifle | horizontal gun kick (large, better), horizontal recoil (large, better), ADS speed (small, worse), and ADS out speed (small, worse) |
What the Bruen R12 Gen. 4 changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| Patriot XMR | Horizontal recoil | 14.4 | 10.8 | −25% (better) |
| ADS speed | 280 ms | 291 ms | +4% (worse) | |
| MAR-9 | Horizontal recoil | 14.9 | 11.2 | −25% (better) |
| ADS speed | 330 ms | 343 ms | +4% (worse) | |
| Oris 8.6 | Horizontal recoil | 30.0 | 22.5 | −25% (better) |
| ADS speed | 260 ms | 273 ms | +5% (worse) |
Smaller changes are left out of the table: 2 other stats on the Patriot XMR, 2 other stats on the MAR-9, and 2 other stats on the Oris 8.6.
Changes across weapons
The stats it changes on 3 weapons, with the lowest and highest change.
| Stat | Weapons | Lowest change | Highest change | Verdicts |
|---|---|---|---|---|
| Horizontal recoil | 3 | −25% | −25% | 3 better, 0 worse |
| ADS speed | 3 | +4% | +5% | 0 better, 3 worse |
| Horizontal gun kick | 3 | −30% | −30% | 3 better, 0 worse |
| ADS out speed | 3 | +3% | +4% | 0 better, 3 worse |
How it ranks among muzzle attachments
Its largest change on each weapon, compared with the other muzzle attachments the source lists that stat for.
- Patriot XMR: its large horizontal recoil change (better) is the best of 4 muzzle attachments.
- MAR-9: its large horizontal recoil change (better) is the best of 4 muzzle attachments.
- Oris 8.6: its large horizontal recoil change (better) is the best of 4 muzzle attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the Bruen R12 Gen. 4
No popular build listed by CODMunity uses the Bruen R12 Gen. 4. That says nothing about how it performs; most listed attachments are in no popular build.
Frequently asked questions
What does the Bruen R12 Gen. 4 do in MW4?
CODMunity lists 12 stat changes for it across 3 weapons: 6 better and 6 worse. The largest is horizontal recoil −25% on the Patriot XMR (better).
Which weapons can use the Bruen R12 Gen. 4?
Community sites list Patriot XMR, MAR-9, and Oris 8.6. Activision has not published a compatibility list.
Is the Bruen R12 Gen. 4 in a popular build?
No. None of the popular builds that CODMunity lists uses it.