Proceed at your own risk. Installing modded APKs can compromise your device's security and violates the game's terms of service.
Don't try to unlock everything. Master the pistol category first. Complete all pistol challenges 100%, then use those credits to buy one assault rifle. Progression feels rewarding. Gun Club 2 Apk Mod Unlock All
I understand you're looking for information about and its modded APK with "unlock all" features. However, I need to provide some important context: Proceed at your own risk