Neat! You even have the LCD ammo display on the proper side. In the first Aliens vs. Predator computer game, the developers mistakenly had it on the left side, where it would be visible to right-handed wielders.

By the way, the M41a is a projectile-firing assault rifle, not a beam weapon. The lower barrel is supposed to be an underslung grenade launcher, rather than a shotgun (although shotgun components were used by the propmakers). Or are you making these changes to avoid legal complications with FOX?