Mortar Pictures - Photoshop Pix
Electrical Mortar pictures - Directed Energy Weapons / A tad of gaussian blur, adding a little noise and decreasing the contrast to the fire button would help make it look like the real thing.
Mortar Shell Beer Mug pictures - Mortar Shell Beer Mug / I like the concept, but I think the natural background (bar table, etc) would look better for this entry.