How to Get the Lunar Arrow Crosshair Without Lunar Client
Why a Resource Pack Works Instead
Lunar Client ships its own arrow crosshair, but you do not need that client to get the same look. Aimz reproduces the crosshair as a plain resource pack, so it works on vanilla Minecraft and on most servers without any client-side mods or launchers. This means you keep your normal setup and just swap the crosshair texture.
Steps to Apply It
Install the pack into your resourcepacks folder, then enable it from Options, Resource Packs. Because it only replaces the crosshair texture, it will not conflict with gameplay mods, shaders, or other cosmetic packs unless those packs also touch the crosshair. If you already use a PvP texture pack, place Aimz above it in the selected list so the arrow crosshair wins.
What to Expect
You get the arrow-shaped crosshair on any server, including ones that block client mods, since a resource pack is server-safe. The rest of your textures stay exactly as they were. If you later want the vanilla crosshair back, disable the pack or move it below a pack that includes the default crosshair.