First off idk what is and isn't possible within blockland's engine to an extent, so if something's completely not an option then sorry I guess.
Here's a couple of links with a whole bunch of pictures of fictional weapons
http://vk.com/album82258355_110678853http://vk.com/album82258355_153676154
Charge-up Launcher thing
Something like the
Vanu Lancer from Planetside 2, the longer you hold down the trigger, the longer it charges, increasing the damage and velocity and all that.
Shoots a big generic energy weapon projectile.
Or you could do something like the
Storm PSR from blops 2 that's pretty similar, but the charge increases how high its entry value is.
Flechette RifleAutomatic weapon that would fire projectiles similar to the Half Life 2 Hunter's, those thingies that stick to surfaces and people and create small explosions after a couple of seconds.
Flak Autocannon/Rifle/Machinegun/WhateverSome type of big automatic HMG esque weapon that's projectiles would airburst at random, obviously not within range to damage the person using it.
Chainlink CannonBased off the Mauler from Cortex Command, a shotgun that fires links of chain instead of just pellets.
Probably would end up just being a shotgun reskin but maybe it could have fancy effects, slow players on contact or something.
Shard CannonFancy scifi shotgun that fires a multitude of crystal shards that explode on contact with things. Would probably look really cool honestly.
Chemrail RifleA more traditional style railgun that fires single kinetic projectiles that'd slow the target on impact and cause them to bleed for a second or two, along with a lot of damage.
Ablative CrossbowHigh tech crossbow that would fire blunt-ended bolts that tumble players on impact in the direction the projectile was going, but not do a whole lot of damage.
Single shot of course.
Detonator SMGA not too special SMG, except that it would be thrown like a grenade and explode if reloaded / right clicked.
Based off Borderlands 2 Tediore weapons.
Antimatter BeamSomething similar to the current railgun, except it would have a short charge time and fire a projectile like the HL2 Strider's warp cannon.
Canister LauncherBasically a rocket propelled shotgun, would shoot loads of shrapnel that could ricochet off surfaces once.
Other less well thought out ideas
Rocket Boomerangs - Rocket launcher that fires rockets that curve back in the general direction of the person firing them. Probably Self Delete.
Ricochet Weapon - Something automatic that fires energy bolts or the like that ricochet off walls a certain number of times, like the sawblade rifle I guess.
Grenade Shotgun - Triple barreled grenade launcher that'd shoot all three at a time in some wide spread. Based off
this.
EMP Weapon - Would have to have the shields enabled or something, would completely deplete and disable a players shield for x seconds, but would do 0 damage.
Arc Caster - Something like that one District 9 weapon or the wunderwaffe from CoD Zombies, shoots big electric bolts that can jump between players.
Maybe it'd have the same effect as the EMP gun.
Hope this sparks some ideas, and thanks to polywater for help with a bunch of these.