RGM-79 SP GM Sniper w/BFG

The Sniper-rifles second configuration.  Considering how I can't read Japanese it either uses traditional shells, or it fires a narrower beam.  Either way, when stood on it's stock, this BFG is taller than the model now wielding it.

And that is taking into account the antenna on the head.

HGUC Model #146: GM Sniper II
Builder Parts System Weapons Set #4

Pictures taken at Universal Bitz & Games, Sioux Falls, SD