This is just an idea I cooked up and told a friend (Takhan) about it.
They would be 4-shot guns, with the projectile being similar to Antigua lines. They would fire a bit faster but a little weaker than Blaster lines.
The charge would consecutively fire four large bullets with more pronounced colors at the firing speed of the Iron Slug. The player would be able to aim all four of these shots. Each shot would send the player back 1/4 of a square.
They look like the Tanfoglio T95 (lolwikipedia) in general.

[*} - [Name]
A: [Appearance]
D: [Damage Type]
E: [Effects]
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*** - Maria
A:Light gray, with some dull gold lines. "Maria" is etched on the right side. Fires yellow bullets.
D: Normal
E: No special effects
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**** - Thornmary
A: Dull grey, with emerald green lines "Thornmary" is etched on the right side. Fires emerald colored bullets.
D: Piercing
E: May cause Minor poison on normal attacks, and Moderate Poison on the charge

***** - Rosemary
A: Bright grey, with lime and rose-red colored lines. Roses can be seen painted on the grip. "Rosemary" is etched on the right side. Fires ruby-red bullets (or lime, if ruby-red looks bad)
D: Piercing
E: May cause Moderate Poison on normal attacks, and Moderate Poison and [Very] Minor Sleep on the charge.

NOTES: 3:45 PM - Takhan: people will argue more than one status is OP
3:46 PM - Takhan: but the statuses of course won't be as strong compared to normal weapons
3:46 PM - Takhan: like poison usually makes a target do half its damage
3:46 PM - Takhan: let's say this one makes it be nerfed to 3/4
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**** - Santa Maria
A: Silver, with gold lines. "Santa Maria" is etched on the right side. Fires light yellow bullets.
D: Elemental
E: May cause Moderate Stun on normal attacks, and Moderate Stun on the charge.
Larger knockback and damage radius than Thornmary and Black Maria. The charge's fourth shot has large knockback (same as Cold-Iron Vanquisher's charge)

***** - Ave Maria
A: Bright silver, with gold lines. The "Our Lady of Guadalupe" ( http://upload.wikimedia.org/wikipedia/commons/2/2c/Virgen_de_guadalupe1.jpg ) is painted on the grip. "Ave Maria" is etched on the right side. Fires bright yellow bullets.
D: Elemental
E: May cause Moderate stun on normal attacks, and Strong Stun on the charge.
Much larger knockback and damage radius than Bloody Mary and Rosemary. The charge's fourth shot has the same Knockback as Leviathan's charge.
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**** - Black Maria
A: Black, with dull red lines. "Black Maria" is etched on the right side. Fires red bullets.
D: Shadow
E: May cause Minor Bleeding* on normal attacks, and Moderate Bleeding on the charge

***** - Bloody Mary
A: Jet black, with blood-red lines. The same familiar figure found on Ave Maria is found on the grip, except with red robes and completely black skin. "Bloody Mary" is etched on the right side. Fires deep red bullets.
D: Shadow
E: May cause Moderate Bleeding on normal attacks, and Moderate Bleeding and [Very] Weak Curse on the charge

NOTES: Bleeding would be a new status effect unaffected by resistances. It would deal around the same damage as shock and reduce defense.
Curse's duration would be short, and the damage caused by it would be heavily reduced.
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Any constructive criticism would be appreciated.
Takhan helped me with balancing and some other important stuff.