Here is the lego MTAR-X made out of lego bricks.this is the version of the in game-in space model of the gun. I wasn't able to find any pictures of the scope, so I wasn't able to make it.
Step 1: Reload
The reload has two parts-the magazine and the mag release.
Step 2: Sights
Since the sighs are crap, I made a red dot sight, too.
Step 3: Charging Handle
This also has a working charging handle.
Step 4: First Person View
A first person view.