Gun builder simulator is app that allow you to tune up weapons as you want! From the most popular military assault rifles to the pistols, machine guns, sniper rifles, shotguns, sub-machine guns with unlimited ammo, realistic muzzle flashes and 3D ejecting shells and functional attachments. Every single weapon is for free with all attachments unlocked.
Download the free .apk file of Gun Builder Simulator Free 1.2.2 and have a look at users' reviews on Droid Informer. This installer takes up 21 MB on disk and it runs on Android devices 4.4 and above. The security report shows that the app is totally safe. Advanced Weapon Tech is the creator of this application which relates to the Simulation Games category.