The fundamental principles of making a gun in Roblox studio is that it only needs to deal damage from range, and give visual and audible indicators. The simplest method is hitscan/raycast which is just a straight line.
Chapters:
0:00 Setup
0:24 Communication
1:10 Hitscan
2:02 Visuals
2:58 Sounds
3:21 Model
Gun Model:
https://create.roblox.com/store/asset...
Important links used:
https://devforum.roblox.com/t/introdu...