This is NoAds version. This game is a gun simulation wich allows you to assemble and disassemble several firearms from different eras - the game includes assault rifles, sniper rifles, machine guns, submachine guns, pistols, revolvers and shotguns. Assembly and dissasembly are not the only things you can do.
The download of the app doesn't contain viruses or any kind of malware. Sega SVD has developed Weapon stripping NoAds that falls into the Simulation Games category. According to the latest information, the game is rated 4.8 on Google Play.