Octa-63 Comp attachment in MW4
The Octa-63 Comp is a muzzle attachment (“Vertical Comp”) that community sites list for 4 weapons: Patriot XMR, Cronen Squall, MAR-9, and Oris 8.6. CODMunity lists a stat change on 4 of them; the largest is vertical recoil −13% 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 Octa-63 Comp
Activision publishes no compatibility list; 2 community sources report these 4 weapons. No weapon level is reported.
| Weapon | Class | Weapon level | Stats with a listed change |
|---|---|---|---|
| Patriot XMR | Assault Rifle | vertical recoil (moderate, better), vertical gun kick (moderate, better), ADS speed (small, worse), and ADS out speed (small, worse) | |
| Cronen Squall | Assault Rifle | vertical recoil (moderate, better), vertical gun kick (moderate, better), ADS speed (small, worse), and ADS out speed (small, worse) | |
| MAR-9 | Marksman Rifle | vertical recoil (moderate, better), vertical gun kick (moderate, better), ADS speed (small, worse), and ADS out speed (small, worse) | |
| Oris 8.6 | Marksman Rifle | vertical recoil (moderate, better), vertical gun kick (moderate, better), ADS speed (small, worse), and ADS out speed (small, worse) |
What the Octa-63 Comp 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 | Vertical recoil | 52.6 | 45.8 | −13% (better) |
| ADS speed | 280 ms | 291 ms | +4% (worse) | |
| Cronen Squall | Vertical recoil | 50.4 | 43.8 | −13% (better) |
| ADS speed | 305 ms | 317 ms | +4% (worse) | |
| MAR-9 | Vertical recoil | 62.0 | 53.9 | −13% (better) |
| ADS speed | 330 ms | 343 ms | +4% (worse) | |
| Oris 8.6 | Vertical recoil | 52.0 | 45.2 | −13% (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 Cronen Squall, 2 other stats on the MAR-9, and 2 other stats on the Oris 8.6.
Changes across weapons
The stats it changes on 4 weapons, with the lowest and highest change.
| Stat | Weapons | Lowest change | Highest change | Verdicts |
|---|---|---|---|---|
| Vertical recoil | 4 | −13% | −13% | 4 better, 0 worse |
| ADS speed | 4 | +4% | +5% | 0 better, 4 worse |
| Vertical gun kick | 4 | −13% | −13% | 4 better, 0 worse |
| ADS out speed | 4 | +3% | +4% | 0 better, 4 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 moderate vertical recoil change (better) is the best of 4 muzzle attachments.
- Cronen Squall: its moderate vertical recoil change (better) is the best of 5 muzzle attachments.
- MAR-9: its moderate vertical recoil change (better) is the best of 4 muzzle attachments.
- Oris 8.6: its moderate vertical 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 Octa-63 Comp
No popular build listed by CODMunity uses the Octa-63 Comp. That says nothing about how it performs; most listed attachments are in no popular build.
Frequently asked questions
What does the Octa-63 Comp do in MW4?
CODMunity lists 16 stat changes for it across 4 weapons: 8 better and 8 worse. The largest is vertical recoil −13% on the Patriot XMR (better).
Which weapons can use the Octa-63 Comp?
Community sites list Patriot XMR, Cronen Squall, MAR-9, and Oris 8.6. Activision has not published a compatibility list.
Is the Octa-63 Comp in a popular build?
No. None of the popular builds that CODMunity lists uses it.