BUILD A GUN ARMY
Zombies are attacking your base — prepare your defenses. Buy guns to build your weapon arsenal, defend against waves of enemies and pick up coins to buy better guns. Your guns fire automatically and keep defending even while you are offline. Collect all the weapons, build the ultimate defense and become the richest player in Build a Gun Army, an idle incremental simulator by Weapon Williamson on Roblox.
Codes
Last checked 2026-08-23Checked 2026-08-23. The official page, the Weapon Williamson group and every major codes tracker list no working codes — we never invent codes.
How Build a Gun Army works
The four-beat loop behind every sessionBuy guns
Every gun you buy joins your arsenal and fires at zombie waves automatically — no aiming, no reloading.
Collect coins
Cleared waves drop coins on the battlefield. Pick them up and reinvest them into better guns.
Earn offline
Your guns keep defending while you are away. Log back in to a bigger pile of rewards.
Collect them all
The long-term goal: collect all the weapons. Progress never resets — the arsenal only grows.
Gamepasses
3 passes — names & prices verified against the official Roblox APIAuto Loot
Automatically collects the coins that drop during zombie waves, so your income keeps flowing without manual pickup.
29 RobuxAuto Open
Opens crates and mystery boxes automatically, removing the manual open step from the weapon-collecting loop.
399 Robux2x Game Speed
Doubles the overall game speed so waves clear, coins drop and progression runs at twice the pace.
Guides
2 guidesBuild a Gun Army Beginner Guide — Core Loop and Fast Start
The Build a Gun Army starter path: the buy-and-defend loop, coin pickup, offline earnings and how to grow your arsenal fast.
Updated 2026-08-23GamepassAre Build a Gun Army Gamepasses Worth It?
All three Build a Gun Army gamepasses compared: prices, what each one automates, and which pass to buy first as a free-to-play player.
Updated 2026-08-23Latest Updates
Verified milestones onlyGame launch
Build a Gun Army went live on Roblox on July 5, 2026, published by the group Weapon Williamson. The core loop from day one: buy guns that fire automatically, defend your base against zombie waves and collect coins to buy better guns.
Developer group reaches Community Tier 3
The Weapon Williamson group was upgraded from Community Tier 2 to Tier 3 on Roblox, reflecting the game's rapid growth past 130,000 group members.
Three gamepasses released (Auto Loot, Auto Open, 2x Game Speed)
A batch of three gamepasses — Auto Loot (99 R$), Auto Open (29 R$) and 2x Game Speed (399 R$) — appeared in the store on August 22, 2026, alongside quality-of-life updates around coin collection and box opening.