So the entire sighting report and photos were faked but not using PhotoShop or any other computer programs. It was so simple and unsophisicated that it fooled the experts, not because of what it was, but how it got there. Gaston or friends or threw or launched the model into the air and shot a series of photos. Either that or fictionalized characters are building models of futuristic weapons.

Note the location of the three semi-circular objects and the logo. They appear to be virtually the same shape and color in both photos.

This model was designed as a counter measure of all the Metal Gear variations around the world. It was designed for the Marines, its a amphibious Metal Gear, able to be deployed solo. It was also designed to be the protectors of Arsenal Gear, a army of 25 Rays. The Navy model was different from the marines model, did not have a tail, and was unmanned. It is armed with vulcan cannons within the arms, or flippers. It has small rocket pods on the knees, as well as pods on the back that lauch pods that open and lauch showers of little missiles out of them. And the most powerful weapon is the hydro cutter located in the mouth. It can draw in normal sea water, and highly pressure the water, and fires out the mouth and can rip through just about anything. But was defeated by Raiden.

Specifications:
Project Development leader:(Marine model) Commandant Scott Dolph (Navy) Patriots
Developed for:Marines,Navy
Crew:(Marines) 1 (Navy) unmanned
Purpose:Amphibious Anti Metal Gear Vehicle
Armor:Titanium Alloy,Artificial Muscle Tissue Regenerative Abilty To Form A Paste Around Battle Damage,which Appears to be a form of Blood,And Will Shut Down That Damaged Area To Insure It Wont Effect The Rest Of The Unit.
Source: solidsnake19148.tripod.com

According to en.wikipedia.org: "Metal Gear is the name for a series of fictional mecha in the Metal Gears series of video games. While each game has a new Metal Gear with a different role, they are typically autonomous nuclear launch platforms which the player must destroy in order to save the world and complete the game. Often (but not always), confronting the latest model of Metal Gear is one of the final challenges of each game."