can you make a spawnable version for sandbox?

This is a TTT item, not sandbox. You get it via the TTT item menu.

how to spawn it

Are you using the workshop version or have you downloaded and extracted the addon? As i sayed previusly in the comments, there was an update that changed the lang files causing bugs. I updated the addon to correct it. Please get the latest version of the addon.

I used the SWEP Construction Kit by Clavus, you can search the tool in the workshop.

Sorry for asking this but may i ask how you made the model with just hl2 props? i'm trying to do something similar

If anyone has a bug because of lang files, just re-download the addon. There was a pointless update in ttt where they changed the portuguese translation lang because some weird guy thought it would be a good idea rename it 'brazilian portuguese'and it broke the whole gun. I already updated a fix for this, so if you are still with lang bugs just get the lattest version and all should be well

sandbox version would be funni

I just updated the weapon. I fixed the spectator bug, the custom model bug and the ammo drop bug. Shooting a player or breaking free from the ice will both now show up at the damage logs. If anything else shows up please contact me.

But if the player is holding a crowbar, then this bug does not occur.

Unfortunally that bug has nothing to do with the weapon, but the models you are using. The weapon simply replaces the texture of the player model when firing upon it. It seems that model is not taking overlaying textures very well.

I found a bug with custom models.
Video - https://cloud.mail.ru/public/2joX/2Lx7CGrJA

Alright

The point of this gun is to be a light addon, without too much stuff to download so light servers dont suffer. All the effects are half-life 2 and Gmod based, so you dont have to download them. You can add it yourself tho, there are comments in the code pointing to the part where the player is frozen.

Can you better add effects like this:
1. https://i.ibb.co/RbxW1Wt/1.png
2. https://i.ibb.co/Bwwjjp8/2.png

The addon now has convars (they are all in the description). Also i fixed the bug where people got a froozen screen when using the teleporter.

Convars?

SAND BOX SAND BOX SAND BOX WE WANT A SAND BOX VERSION

can you make a sandbox version

I'm afraid my condition has left me cold to your pleas of mercy :)