You can’t really make R15 arms fully disappear with the same easy avatar trick people use for R6. The common method relies on using a free bundle like City Life Woman and switching to R6, not R15.

What works best

For an R15 look, the usual options are:

  1. Use a custom avatar package or layered clothing that hides the arms as much as possible.
  2. Use accessories like a front item or vest to cover the arm area.
  3. If you’re scripting in your own game, set the R15 arm parts’ transparency to 1 in a local or server script.

Important limitation

The videos and forum posts I found say the “no arms” trick is mainly for R6 , and R15 does not behave the same way. In other words, if you want your avatar to look armless in normal Roblox dress-up, R15 is much harder and usually only gets a “hidden arms” effect, not truly invisible arms.

Simple workaround

If your goal is just the look, try this:

  • Switch to R6.
  • Equip the free City Life Woman bundle.
  • Match arm and torso colors so the hands are less noticeable.
  • Add a front accessory to cover the shoulder area.

For your own game

If you mean in a Roblox experience you’re making, the scripting approach is straightforward: hide or destroy the arm parts depending on rig type. A DevForum example shows setting all R15 arm segments’ transparency to 1, and handling R6 arms separately. Another DevForum post shows a similar approach with LocalTransparencyModifier for first-person visibility control.

Quick take

So the short answer is: R15 arms usually can’t be made truly invisible with the standard avatar editor; use R6 for the classic no-arms trick, or script the arms invisible in your own game.

TL;DR: R6 is the easy route for armless avatars, while R15 mostly needs hiding tricks or custom scripting.