Tinkering with her weapons

Yang sat at one of the desks of the team RWBY dorm, wearing her typical sleepwear of shorts and an orange tank top. Tools were spread out on either side of her, beads of sweat dotted her forehead, and her gauntlets were sitting in pieces in front of her.

"How's it going?" Ruby asked, peeking over Yang's shoulder, curiosity and wonder evident in her silver eyes. "Is it almost done?"

"Getting there," Yang muttered, doing her best to keep her focus.

Yang was currently modifying her gauntlets to allow for a new bullet type that had become publicly available earlier this week. The bullet was designed to use more fire dust than most other cartridges. However, that also meant it was slightly bigger than most other cartridges. As such, Yang was trying to make her weapons able to use different types of bullets, depending on what was needed.

"Are you sure this is a good idea?" Weiss asked, looking through a pamphlet that came with the bullets.

"Oh, you're no fun," Ruby said, frowning over at her. "This is gonna be so awesome, when she's done!"

"I'm just saying..." Weiss set the pamphlet down on the desk, folding her arms.

Yang shook her head but didn't take her eyes off of her project. She had been able to do some pretty impressive damage before, using just the strength of her punches and standard dust bullets. But with this? Oh boy...

It took Yang another hour or so to get the firing mechanism just right. Once it was done, she loaded a set of the bullets inside the chamber, and they fit perfectly. She then took them out and loaded her usual bullets in, and they fit too! It was perfect!

"Yes!" Yang shouted, pumping her fist in the air.

"Careful!" Weiss shouted, covering her face with her hands. "Live ammunition in the dorms!"

Yang blushed and lowered her arms.

"Sorry," she said sheepishly. "This is just so cool! I can't wait to use these in class, tomorrow..."

The next day, team RWBY marched off to combat class, under the strict tutelage of Professor Goodwitch. After a brief introduction, she grabbed her tablet and addressed the entire class.

"Are there any volunteers for the first fight?"

Immediately, Yang's hand shot into the air, eager to put her new toys to the test.

"Very well. Ms Xiao Long," Goodwitch said, tapping her screen a few times to bring Yang's information up on the large screen above the arena. "Who are you going to challenge?"