GlitchesThis glitch only works if you purchase the Martial Law or Supernova add on packs.
Go to any store and purchase one of the free Detonator weapons. The gun always comes with full ammo so go launch all the mines, and recover them with the secondary fire. Once the gun has been depleted of ammo, you can then sell it back to the store, and re-buy another fully loaded gun for 0 credits. Doing so will continually add your stock of Detonator Mines which you can then sell back. If you purchase a second detonator and upgrade it, both versions will have the same upgrades. Therefore, if you have max capacity in one, the other will also have 7 mines each time you buy it.