Corio Bisect attachment in MW4
The Corio Bisect is a optic attachment (“4x Scope”) that community sites list for 22 weapons: Han 86, M4, Hyeon Burst, Patriot XMR, and Kastov 762 and 17 more. CODMunity lists a stat change on 8 of them; the largest is ADS speed +13% on the Han 86 (worse). No popular build that CODMunity lists uses it.
Community-reportedggranked and CODMunity, read . Unverified, not Activision data.
Weapons that can equip the Corio Bisect
Activision publishes no compatibility list; 2 community sources report these 22 weapons. No weapon level is reported.
| Weapon | Class | Weapon level | Stats with a listed change |
|---|---|---|---|
| Han 86 | Assault Rifle | ADS speed (moderate, worse), ADS movement speed (moderate, worse), and ADS out speed (moderate, worse) | |
| M4 | Assault Rifle | ADS speed (moderate, worse), ADS movement speed (moderate, worse), and ADS out speed (moderate, worse) | |
| Hyeon Burst | Assault Rifle | vertical gun kick (large, better), horizontal gun kick (large, better), ADS speed (moderate, worse), ADS movement speed (moderate, worse), vertical recoil (moderate, better), horizontal recoil (moderate, better), and ADS out speed (moderate, worse) | |
| Patriot XMR | Assault Rifle | vertical gun kick (large, better), horizontal gun kick (large, better), ADS speed (moderate, worse), ADS movement speed (moderate, worse), vertical recoil (moderate, better), horizontal recoil (moderate, better), and ADS out speed (moderate, worse) | |
| Kastov 762 | Assault Rifle | vertical gun kick (large, better), horizontal gun kick (large, better), ADS speed (moderate, worse), ADS movement speed (moderate, worse), vertical recoil (moderate, better), horizontal recoil (moderate, better), and ADS out speed (moderate, worse) | |
| Oden | Assault Rifle | vertical gun kick (large, better), horizontal gun kick (large, better), ADS movement speed (moderate, worse), ADS speed (moderate, worse), vertical recoil (moderate, better), horizontal recoil (moderate, better), and ADS out speed (moderate, worse) | |
| Axion | Assault Rifle | vertical gun kick (large, better), horizontal gun kick (large, better), ADS speed (moderate, worse), ADS movement speed (moderate, worse), ADS out speed (moderate, worse), vertical recoil (moderate, better), and horizontal recoil (moderate, better) | |
| Cronen Squall | Assault Rifle | vertical gun kick (large, better), horizontal gun kick (large, better), ADS movement speed (moderate, worse), ADS speed (moderate, worse), vertical recoil (moderate, better), horizontal recoil (moderate, better), and ADS out speed (moderate, worse) | |
| ISO Nightshade | SMG | No change listed | |
| VEL 46 | SMG | No change listed | |
| PPSh-41 | SMG | No change listed | |
| X-58 Nyx | SMG | No change listed | |
| Rezi 12 | Shotgun | No change listed | |
| Warlord | Shotgun | No change listed | |
| FiNN LMG | LMG | No change listed | |
| Type 73 | LMG | No change listed | |
| APOC-338 | LMG | No change listed | |
| MAR-9 | Marksman Rifle | No change listed | |
| Oris 8.6 | Marksman Rifle | No change listed | |
| KG-7 Vulcan | Sniper Rifle | No change listed | |
| Astaroth .57 | Sniper Rifle | No change listed | |
| Signal 50 | Sniper Rifle | No change listed |
What the Corio Bisect changes
Percent changes are relative to the base value with nothing attached (CODMunity, read November 4, 2026).
| Weapon | Stat | Base | With it | Change |
|---|---|---|---|---|
| Han 86 | ADS speed | 250 ms | 283 ms | +13% (worse) |
| ADS movement speed | 2.47 m/s | 2.22 m/s | −10% (worse) | |
| M4 | ADS speed | 240 ms | 271 ms | +13% (worse) |
| ADS movement speed | 2.51 m/s | 2.26 m/s | −10% (worse) | |
| Hyeon Burst | ADS speed | 275 ms | 308 ms | +12% (worse) |
| ADS movement speed | 2.36 m/s | 2.12 m/s | −10% (worse) | |
| Vertical recoil | 38.3 | 34.5 | −10% (better) | |
| Horizontal recoil | 16.4 | 14.8 | −10% (better) | |
| Patriot XMR | ADS speed | 280 ms | 311 ms | +11% (worse) |
| ADS movement speed | 2.22 m/s | 2.00 m/s | −10% (worse) | |
| Vertical recoil | 52.6 | 47.3 | −10% (better) | |
| Horizontal recoil | 14.4 | 13.0 | −10% (better) | |
| Kastov 762 | ADS speed | 280 ms | 311 ms | +11% (worse) |
| ADS movement speed | 2.34 m/s | 2.11 m/s | −10% (worse) | |
| Vertical recoil | 51.9 | 46.7 | −10% (better) | |
| Horizontal recoil | 28.7 | 25.8 | −10% (better) | |
| Oden | ADS movement speed | 2.18 m/s | 1.96 m/s | −10% (worse) |
| ADS speed | 320 ms | 352 ms | +10% (worse) | |
| Vertical recoil | 49.4 | 44.5 | −10% (better) | |
| Horizontal recoil | 15.2 | 13.7 | −10% (better) | |
| Axion | ADS speed | 260 ms | 291 ms | +12% (worse) |
| ADS movement speed | 2.41 m/s | 2.17 m/s | −10% (worse) | |
| Vertical recoil | 48.9 | 44.0 | −10% (better) | |
| Horizontal recoil | 13.7 | 12.3 | −10% (better) | |
| Cronen Squall | ADS movement speed | 2.24 m/s | 2.02 m/s | −10% (worse) |
| ADS speed | 305 ms | 336 ms | +10% (worse) | |
| Vertical recoil | 50.4 | 45.4 | −10% (better) | |
| Horizontal recoil | 6.3 | 5.7 | −10% (better) |
CODMunity lists no stat change for the ISO Nightshade, VEL 46, PPSh-41, X-58 Nyx, Rezi 12, Warlord, FiNN LMG, Type 73, APOC-338, MAR-9, Oris 8.6, KG-7 Vulcan, Astaroth .57, and Signal 50.
Smaller changes are left out of the table: 1 other stat on the Han 86, 1 other stat on the M4, 3 other stats on the Hyeon Burst, 3 other stats on the Patriot XMR, 3 other stats on the Kastov 762, 3 other stats on the Oden, 3 other stats on the Axion, and 3 other stats on the Cronen Squall.
Changes across weapons
The stats it changes on 8 weapons, with the lowest and highest change.
| Stat | Weapons | Lowest change | Highest change | Verdicts |
|---|---|---|---|---|
| ADS speed | 8 | +10% | +13% | 0 better, 8 worse |
| ADS movement speed | 8 | −10% | −10% | 0 better, 8 worse |
| Horizontal recoil | 6 | −10% | −10% | 6 better, 0 worse |
| Vertical recoil | 6 | −10% | −10% | 6 better, 0 worse |
| ADS out speed | 8 | +8% | +10% | 0 better, 8 worse |
| Horizontal gun kick | 6 | −30% | −30% | 6 better, 0 worse |
| Vertical gun kick | 6 | −30% | −30% | 6 better, 0 worse |
How it ranks among optic attachments
Its largest change on each weapon, compared with the other optic attachments the source lists that stat for.
- Han 86: its moderate ADS speed change (worse) is the best of 10 optic attachments.
- M4: its moderate ADS speed change (worse) is the best of 10 optic attachments.
- Hyeon Burst: its moderate ADS speed change (worse) is the best of 9 optic attachments.
- Patriot XMR: its moderate ADS speed change (worse) is the best of 10 optic attachments.
- Kastov 762: its moderate ADS speed change (worse) is the best of 9 optic attachments.
- Oden: its moderate ADS movement speed change (worse) is in the upper half of 10 optic attachments.
- Axion: its moderate ADS speed change (worse) is the best of 10 optic attachments.
- Cronen Squall: its moderate ADS movement speed change (worse) is in the upper half of 10 optic attachments.
Pros and cons the sources list
None reported, which is different from having none.
Popular builds that use the Corio Bisect
No popular build listed by CODMunity uses the Corio Bisect. That says nothing about how it performs; most listed attachments are in no popular build.
Frequently asked questions
What does the Corio Bisect do in MW4?
CODMunity lists 48 stat changes for it across 8 weapons: 24 better and 24 worse. The largest is ADS speed +13% on the Han 86 (worse).
Which weapons can use the Corio Bisect?
Community sites list 22 weapons, among them Han 86, M4, Hyeon Burst, Patriot XMR, Kastov 762, Oden, Axion, and Cronen Squall. Activision has not published a compatibility list.
Is the Corio Bisect in a popular build?
No. None of the popular builds that CODMunity lists uses it.