Hallo!
I made a sniper rifle pack for minecraft Java 1.18.2!

No Optifine needed as far as I can tell.
No renaming the item needed, just turn the pack on, grab a crossbow, and you're good to go!

This pack contains a high detail sniper rifle with a loading animation.
The rifle has different ways of display, it displays in first person, second person, as a dropped item on the floor, and on an item frame, making it look mounted on a wall.

Spyglass: It changes the spyglass texture to look like the rifles scope.

You can instantly shoot by loading the rifle, switching to the spyglass, zoom, and scroll to the rifle to instantly shoot.
Make sure to have the two items right next to each other in the hotbar.

Installation is as per usual, drag it to the texture pack screen in minecraft (left hand side) and drop it there! If this does not work extract the pack folder and manually put it in Users/YourName/Appdata/Roaming/.minecraft/resourcepacks

EDIT: I have fixed the pack file, I had zipped the previous version wrong but I believe it is fixed now :D
So if you have had issues in the past with importing it should be fixed now and you can redownload the pack.