COD4 perks and killstreaks: MW4 comparison

Where do the COD4 effects and unlocks come from?

The community COD4 perk template lists 22 perks: seven in the first tier, seven in the second and eight in the third. The linked perk pages below supply the COD4-specific unlock fields and transcribed descriptions. Quoted wording is attributed to that community transcription of the game, rather than a fresh measurement or an MW4 effect.

The community class rules describe three perk slots, one per tier. Those rules belong to original COD4, not Modern Warfare (2019), Remastered, the separate Mobile game or MW4. Grenade launchers and grips interact with the first perk slot in COD4; attachment choices are therefore part of the historical class rules, not extra perks added outside them.

What are all the COD4 perks?

Every unlock level and quoted effect in this list is sourced to its adjacent community article. “Default” preserves a default-availability entry rather than inventing a numerical unlock level.

Tier 1

• C4 x2 — Level 1. “Remote detonation explosive.”
• RPG-7 x2 — Level 1. “Rocket Launcher with 2 rockets”
• Special Grenades x3 — Level 1. “3 special grenades. No smoke.”
• Bomb Squad — Level 14. “Ability to seek out enemy explosives.”
• Claymore x2 — Level 23. “Trip activated explosive mine.”
• Bandolier — Level 32. “Extra ammunition magazines.”
• Frag x3 — Level 41. “3 Frag grenades”

Tier 2

• Stopping Power — Default. “Increased bullet damage.”
• Juggernaut — Default. “Increased health”
• Sonic Boom — Default. “Higher explosive weapon damage.”
• UAV Jammer — Level 11. “Undetectable on enemy radar.”
• Sleight of Hand — Level 20. “Faster reloading.”
• Double Tap — Level 29. “Greatly increased fire rate of weapons. Bonus: Significantly improved hip-fire accuracy.”
• Overkill — Level 38. “Carry two primary weapons, no pistol.” Generic article-level description; see attribution below.

Tier 3

• Extreme Conditioning — Level 1. “Sprint for longer distances.”
• Steady Aim — Default. “Increased hip-fire accuracy.”
• Deep Impact — Default. “Deeper bullet penetration.”
• Last Stand — Level 8. “Pull out your pistol before dying.”
• Martyrdom — Level 17. “Drop a live grenade when killed.”
• Iron Lungs — Level 26. “Longer breath for steadier sniper shots.”
• Eavesdrop — Level 35. “Hear voice chat of nearby enemies.”
• Dead Silence — Level 44. “Make less sound when you move.”

How should you read those descriptions?

Overkill needs particular care. Its quoted description appears above the source article’s individual game sections. It is the generic perk description, not a COD4-section-specific quotation. The COD4 section supports the second-primary behavior and unlock; that does not change where the quote is located. Other entries use the descriptions transcribed inside their COD4 sections in the supplied reference.

Descriptions also do not establish every numerical magnitude. Sonic Boom’s wording says damage, while the community explanation describes a larger lethal portion of the blast radius. Extreme Conditioning concerns sprint duration rather than sprint speed. These distinctions are useful when reading old perk summaries, but neither effect can be reassigned to MW4 by matching a similar name.

What were COD4’s killstreak rewards?

The community killstreak pages record a fixed progression: UAV Recon at three kills, Airstrike at five, and Helicopter at seven. UAV Recon reveals enemy positions, Airstrike attacks a selected area, and Helicopter supplies airborne support. These are the original COD4 names and thresholds, not the shortened labels or selectable rewards of a later game.

The community template separately marks AC-130 and Harrier Strike as cut killstreaks. They must not be counted as additional shipped COD4 rewards. The aircraft’s campaign appearance likewise does not establish that it was an earnable multiplayer killstreak. The COD4 legacy page separates campaign and multiplayer records.

What changes in MW4?

The Activision launch article lists 18 perks, arranged in three tiers of six, and the launch patch notes confirm 17 selectable killstreaks. MW4’s selectable perk-slot count is not published in the supplied reference; a tier count is not sufficient evidence for a slot rule. Do not import COD4’s slot count into that field.

Only Overkill and Bomb Squad carry over by perk name in the community comparison. Overkill moves from COD4’s second tier to MW4’s first, while Bomb Squad moves from COD4’s first to MW4’s second. Similar roles under different names are comparisons, not proof of identical effects or tuning.

COD4’s UAV Recon becomes MW4’s UAV, alongside a separate Advanced UAV. COD4’s Helicopter is compared with Attack Helicopter. Plain Airstrike is absent from the MW4 roster; Artillery Beacon occupies an artillery-support role. The October 19 publisher list places Artillery Beacon at six kills and the AC-130-style Gunship at twelve. These are dated reference requirements, not independently verified current launch costs: the later patch notes retain an increased cost for all streaks.

For UAV, those later notes explicitly give five kills, or four with Hardline, superseding the earlier list. The MW4 perk and killstreak guide records that correction. MW4 damage, time-to-kill, recoil and effective-range measurements remain not published in the available records; COD4 effects cannot fill those gaps.

The COD4 weapon reference keeps perk equipment separate from the firearm roster.

Sources

• Community COD4 perk template — tiers and cut entries; individual effect sources linked above.
• Community COD4 article — class rules; MW4 article — name comparisons.
• Activision launch article and later launch patch notes — MW4 roster and UAV correction.