What you're proposing is a lengthened reload time and a static, tracked clip size. In other words, more reloading. Unless the damage is buffed considerably higher than the Blaster line, it is a direct downgrade.

Why is it that Blaster-line users always skip their reload animation? I'll tell you:
1) It increases your mobility.
2) It increases your overall damage per second.
3) It allows you to block at all times. This is the big one.

For Antigua users, shooting the last shot vs. skipping the reload animation is a little more arguable because the reload time is shorter and the damage doesn't vary as much between the styles, but skipping still means you can block at all times (3). What you are suggesting means we have to reload, every time. That's poppycock! Having to move slowly or stop entirely to reload, when you can't block during the animation? No one would want that. It's not fun or interesting, least not in Spiral Knights.

If you want a new line, then fine, suggest that. But to come here suggesting radical changes to a popular line that shines during Vanaduke because it shoots quickly, doesn't reload often and doesn't constantly stop you from blocking? Madness.

Did we forget about speedloaders?
Why not just have the animation open the breach and cram in a speedloader?
We have energy weapons but not little bits of metal that hold bullets?

I think you need to add that the new fast firing weapon, needs to allow players to walk while shooting.
Autogun is fast, but its not accurate(spread shot) nor does it allow players to walk.

So i Think suggestion 1 should be more specific in the way i mentioned.

Tell that to the Autogun.

All handgun bullets are made out of Mist Energy.

It would have been neat if the gun had been designed that way from the beginning, but it wasn't. The damage would have to be vastly increased (at least doubled, maybe tripled) to balance out the forced period of vulnerability. In short, it would be a totally different weapon with a totally different feel, not used in the same situations it's used in now, and so nobody who owns one is going to want their weapon to be radically redesigned now that they have it.

New Antigua variant that does Piercing/Normal or just Piercing damage, and operates the way that I suggested in the first post. This variant will not affect any current Antiguas, Blackhawks, Silversixes, or so on.

So you're suggesting a worthless gun instead of making an already limited gun series worthless.

Your idea is bad. It's fueled by a desire to make flavor text on an item dictate its functionality, which is just plum stupid to begin with. Reload times are already the greatest crux of guns next to their poor per-shot damage, and you're proposing that the worst aspect of being a gunner be made a prominent horrible feature on a weapon. I don't see how you DON'T see this as an incredibly bad idea, but I'm fairly certain everyone else has summed it up pretty well.

Nothing involving or related to your suggestion should ever be put in this game as anything but a deliberate joke weapon.