Very few decent weapons. And even fewer fit in Blockland's style.
They often fall within one or more categories.
Slightly Inaccurate Machine Guns
Offenders: Anything Pi has made, Ingram Mac10
Why do we even have these? These often do 10 or so damage, being extremely underpowered compared to the much (unrealistically) overpowered pistols.
Iron-sights
Offenders: 9A-91, MP40, Bushmaster ACR
A subdivision of the slightly inaccurate machine guns, these do the exact same thing except have a 'ultimately awesome' iron-sight secondary function that really shouldn't be called a 'function' as much as a 'feature'.
Re-loaders
Offenders: Tactical Weapon set
These weapons are often 'slightly innacurate machine guns' that reload after 30 shots or so. This adds little to the balance since the reloads are so short. Also, in the Tactical Weapon set, the shotgun never reloads. Hmmph. Often these aren't single-shot weapons that reload.
Slightly different, recolored swords
Offenders: RPG Weapon Set
We don't need a "Bronze Sword" over a "Badspotitium Sword" if they do the same thing with a different color and a little more damage? It's not like they degrade over time. Perhaps they will have longer melee range over the other? Nope. These weapons are extremely consistent with each other, ruining the point of having different weapons.
Head-shot Guns
These are super generic "cul snippers" that shoot at the speed of light, with decent, unless you hit your targets head. Seems balanced, but a blockhead's head is huge. And it's easier just to go right up to them to guarantee you hit them in the head. Is that really a sniper rifle's job?
Shotguns
Offenders: Gshotgun, Ephialtes Shotgun (a bit),
These are simply weapons that shoot out multiple pellets. But with the pellets having such great individual damage, and little damage fall-off, these are great short-range weapons. Unlike the real life counterpart, which reasonable people are used to, mid-range combat is useless, and these are terrible at small targets. Gravity cat's Spas-12, in his weapon set, has pellets that fall down and hit the ground after a certain range, works just like you'd expect it to. As long as you aren't a COD Addict.
Instant-Kill Snipers
Offenders: Kaje's Sniper Rifle
When you shoot someone, they are killed automatically. But these have long reloads after each shot. Seems good to use this at a long distance, right? Errrt! Wrong. With the projectile speed limit, you are better off sticking this gun right up your opponent's arse and blasting them into space.
omg i sound like space guy