I decided to just use a bit of my imagination and create a completely fictional sniper rifle and I called it the Jet SNPR-90. It's basically a large caliber sniper rifle (looks slightly futuristic but still modern enough). I wouldn't say its a complete partial modification since I've only done the sprites and I can't really find the sounds to make it seem powerful. Nevertheless, I think the sprite edit itself is worth presenting.
I personally think the interface is nicely done while the one ingame needs some work - though I quite like the shape of the slightly-modified barrett-fire.
v Attachments below for you to see them and to use them. They are saved as PNG. Bullet and shell sprites not modded.
8.png goes to Interface-gfx\Guns
The rest goes to Weapons-gfx
Don't worry, none of the files will be replaced - just that when you play Soldat you'll see the modded Barrett instead of the usual.
Comments please. And yes, I intend to make it a full modification to the Barrett in future after improving it.