I am a Contract Killer Zombies fan, and I use tapjoy to get free gold. It is a sloooow process. So I want some good tips about weapons for gold, especially Desert Hawk.
My tip for you is to buy Technik machine gun, as it is all-purpose and stronger than cheaper guns. And if you have some gold left, buy Police Model 500, it is much better than 12 Gauge pump and a stronger gun, Lenelli tactical.
But I want to understand is there a purpose of buying a Grenade Shooter or a more expensive gun.