Two additions to the weapon system address different stages of play: finding a useful build early on, and discovering a new option after investing time in a particular weapon.
This article is part of our complete Modern Warfare 4 guide, which collects all of our coverage of the game.
Gunny Provides a Starting Point
According to the official weapons guide, Gunny is an optional tool that recommends builds using attachments the player has already unlocked. The builds were developed by Infinity Ward staff, and the available options update as more attachments are unlocked. Players can select a recommendation and continue changing it manually; there is no requirement to give up Gunsmith or customization.
The potential advantage for a beginner is clear: you can enter combat with a defined starting point and use it to learn what is causing problems. If tracking a target is difficult, that is a specific issue you can try to address. It is more useful than a general feeling that the weapon is “bad,” which could also come from an unfamiliar map or choosing the wrong engagement.
An experienced player may also benefit from comparing their setup with a ready-made build. Our recommendation is to keep the question focused: does the change help at the range you actually play at? Compare it across several similar situations, rather than dismissing a build after one encounter or assuming the developers’ recommendation must be the best competitive choice.
Apex Unlocks Through Weapon Progression
Apex Attachments unlock at the end of progression for a weapon that supports them. They are fitted separately from regular attachments and do not count toward the attachment limit. The beta guide shows examples including an Airburst system for the Han 86 that detonates ammunition in a selected area, and a modification for the FINN LMG that increases its rate of fire but can cause overheating during sustained fire.
These examples offer a reason to return to a familiar weapon and try it in a slightly different role. However, unlocking a new option is not enough to establish that it is better in every situation. When an ability comes with an operational drawback, it is worth checking when it gets in the way, and how much of what worked with the base version still applies.
It will be interesting to see whether the additions encourage a variety of choices over time. We will want to test whether players return to several weapons because of their options, or whether the community quickly converges on one build. That is a question of balance and accumulated experience, which publishing a list of abilities before launch does not resolve.
How to Start Without Getting Lost
For players who want to learn weapon building gradually, we suggest starting with one weapon whose basic handling feels comfortable, choosing a build and noting one recurring problem in play. Only then should you change a component and check whether the problem becomes less pronounced. When an Apex option unlocks, you can compare it with the same familiar baseline.
This also makes it easier to understand what each system adds. Gunny could shorten the path to a first experiment, while Apex could provide a reason for another experiment after a long time with the same weapon. The key is to stick with a question that can be answered through play, rather than changing several things at once and not knowing what helped.


