Here are several custom weapons used now in the military. For most of these weapons, i was inspired by Call Of Duty 4.
About this creation
A Taliban Member with an AK-47. The AK was made using a pair of binoculars, a sawed-off rod, and several Mini figure Limbs. The guy is holding on to the binoculars because Lego guys can't hold on to wrists. If anyone knows of a way, please tell me.
Two Spec-Ops Soldiers with Claymore and C4. the Claymore is made with two red lightsabers superglued to the handle.
Special Operations Units. One with a custom made SAW, and the other with a cheap Chinese Lego knockoff M-16.
Custom Weapons. From top to bottom of columns:M-16, AK-47, M-4 Carbine, G3, W1200, M249 SAW, RPG, MP5A5, Chinese Lego knockoff M-16, Dragunov, and last but not least, the Barrett .50cal.
The Gold Weapons (More to be coming soon)
Yeah, the AK47 was kinda bad, using limbs for the weapons isn't very... well, y'know what I'm trying to say. The draugnov is cool, though. Do you think you could make a gatling gun? I have. I also think the javelin is great.
The M249 and Browing .50 cal machine gun are very cool. The Barrett is awsome. I made my own Barrett but its not very minifig scale like yours and it is not posted yet. I also made my own M249 SAW but its is not as good as yours. Awsome guns!