Without realizing it, Amanda had accidentally set height and muscle to increase instead of decrease.

"Wha-?" Amanda exclaimed, but it was too late! She felt her body groan with growth once more, and this time with more noticeable results. Well defined biceps and triceps emerged, and Amanda's shirt grew even tighter as her shoulders broadened. Her midriff elongated, showing a dense six pack. Trying her best, Amanda tried to loosen her clothes; while she managed to remove her belt in time, an audible rip informed her and her dumbstruck friends that something had given way.

"What was that?!" she asked, trying to get a better look.

"You just split the back of your shirt!" Beth replied.

And through this tear Amanda's friends could see her lats and traps developing, giving Amanda a slight V-taper. "I think it's almost over now.." Amanda commented, But her legs and glutes expanded a little more, assuring that she would gain feminely looks. All said and done, Amanda stopped at 6' 2", with a new C-cup and and a total of 24 extra pounds of muscle, leaving her with a defined swimmer's physique.

"Oops," She sheepishly replied.

---------------------------------------------------------------------------- -------------------------------------------------------------------------------- -

"So, who do we grow next?" Beth continued "I mean, that was pretty fun, wasn't it Amanda?"
"Heck yeah!" she replied, back down to her normal size and in a new set of clothes. "But whoever goes next should probably wear some looser clothes!"
While Beth and Amanda shared a giggle, Sarah was busy examining the gun. "Hey, Amanda? What's under this little hatch here?"
"Huh? What hatch?"
Prying the cover open, the trio found a new set of options on the gun:

RADIUS BLAST/RAY BEAM

AREA OF EFFECT: 1-1000 METERS

The first switch was set to RAY BEAM, and the dial was placed at 1 meter.

"Hmm," mused Beth, "I guess that this changes how the gun works. The 'ray beam' lets us shoot it like a gun, like you did, Amanda. And the 'radius blast' lets the gun affect everyone within a certain distance."
Sarah blinked. "So that means we can be muscle buddies?"
"Awesome! Let's fire this baby up!"