A minoan double-axe bracelet. The axe symbolizes execution, which is what the death penalty basically is.
I hold out my arm and call out the name of my Fullbring. The bracelet flies into my hand, the axes pointing outward, and morphs into the gun, from the grip forward. Death Penalty's gun form is like a cross, with five gun barrels built into the focus points (the four endpoints of the cross and the center of where the arms intersect). There's a lot of fancy silver ornamentation all over the gun, and the chamber is a black and silver drum magizine built into the gun just in front of the trigger guard. The gun may seem barrel-heavy at first glance, but it's actually a perfectly balanced weapon.
Death Penalty's bullets are formed by my Fullbring abilities (i.e. changing the composition of matter), creating bullets from air while charging them with spiritual energy and destructive force so that they look yellow when fired. Its ammo capacity is basically only limited to my remaining spirit energy.
Death Penalty has several "attack modes". To switch between them, I need to flip the gun's hammer into different positions.
"Shotgun" (normal position [the one you see in the picture]):
All five barrels of Death penalty fire at once each time I pull the trigger, and the bullets are fragmentary casings, meaning that they turn into shrapnel when they hit, and they hit hard
. Not quite a shotgun, but it's close enough in terms of damage and range. Death Penalty's most lethal gunnery mode and my personal favorite, but limited to short- and mid-range attacks. I can fire this as fast as I can pull the trigger, meaning that if the first blast doesn't kill you, the second or third probably will.
Miniature "Gauss Cannon" (cocked back position):
While not technically a Gauss Cannon or rail gun (the closest approximation I can think of for you non-Halo people, though it's technically not the same type of magnetic force application), the effect is basically the same: one extremely powerful shot, then a recharge time. The middle barrel fires one powerful round that looks like silvery-blue streak of light, then I have to co
ck the hammer back into position and wait for the gun to finish venting the excess power. The other four barrels still smoke when the round fires because they're releasing the excess force to relieve stress on the central barrel.
Burst Minigun (full up position [as though the gun had already fired and the hammer hasn't been cocked back again]):
This mode fires a two-second burst of extremely high-speed (100 rounds per second [five barrel combined ROF], the same rate of fire as an M61A2 Vulcan gatling cannon) fire from all five barrels with each trigger pull (and no, I can't rapid-fire it, it takes a few seconds before I can do this again and it's exhausting to sustain the cycle for more than three rounds of fire and recharge). This uses us a crapload of spirit energy, and each individual round carries about one-tenth the force of a single "Shotgun" mode bullet, i.e. half a bullet's normal force. However, 200 rounds over two seconds is enough to annhilate any target at the right range.
"Gunsword" mode (I actually have to force the hammer and trigger guard
into the stock of the gun):
This is my close quarters mode. When this activates (when I push the hammer and trigger guard into the stock), the four arms of the cross pop outward and the center barrel sinks into the gun. I flick my arm out to the side, making a 4.5 foot long silver broadsword blade appear from the handle. The four extended arms of the cross act as a guard while my grip shifts to the hamer's old position. The blade isn't perfectly balanced, but it's good enough for me. The changeover isn't instantaneous, which means that despite the ability to engage in close quarters combat, it leaves me open for a few moments while it's switching forms. It's also not possible to fire the gun in this mode, as the barrels are disconnected from the firing chamber and the trigger and hammer are both part of the stock at this point. To change this back to gun mode, I have to dissolve the blade and push the barrels back together (which isn't difficult, but again, changeover time).
What it looks like:
Sorry, no pictures of the blade form. Although the blade itself looks something like Kai's Koorimizu in Shikai, only straight rather than wavy.