Honestly, the event shop needs to be closed and converted to shop items, the whole zc system is ruined beyond repair and the things like the railgun are too easy to get, make them all shop items and it becomes a thing to work for like it was supposed to be. But as of now, the event guns don't fall under any special category anymore since zc are tradable and easy to get, 600zc is pocket change at the tables now. They should be allowed and hopefully soon changed to a shop gun. And yes, i was about to release two gun shops actually (one that was near finished and the other was a planned for way later) but didn't get to complete that because i got fired. Also while on this, we really needed a new shop because due to how these guns were released, and trading contributed to this, the gun system is very flawed in terms of economic reasons and progression which was the main reason i was making the shops, and we just needed new guns too.
And there is no good reason on why a melee shouldn't be part of the prize, there is only gain in allowing this since itll motivate players and keep them active