The Crucifix named PUNISHER. It is the most impressive piece of artillery ever to be seen in an amine show and probably in any cartoon in general! The Punisher has far more than one function, some of them being not as a fire power but different somewhat peaceful and defensive functions! The Punisher is  a main part of Nicks arsenal. It has been with him since he has became Chappel's student and it goes everywhere he preaches his beliefs and faith.
First of all to say that this is not a weapon, this is a mobile arms station, with multifunctional usage! It has at least 6 functions. These are Crucifix of faith,  shield, a chain gun, missile launcher, an ammo storage and secondary weapons storage! These will be explained in detail in what follows and if there is any other functions they will be mentioned in the new upcomming section "more Q and not a lot of A"!
Here is a breakdown of the Punisjer on which i will also base most of my observtions!
The Punisher is in dimesions 6' tall and has about 3' of width. As for the weight it is not defined but for anyone expect Nicholas d Wolfwood and Milly it is extremely heavy. Possible well over 150 lbs. ("it is full of mercy you know!!)

THE CRUCIFIX
First and the least significant usage of Pusniher is the "faith factor". A 6' cross can be seen from quite some distance and it definately gives away a lot of relifious significance as the carrier is the preacher.  the "mercy" thing also is related to spiritual value of the crucifix and it only works for two previously mentioned characters, and in the end somewhat for Vash through Wolfwoods spirit! Bottom line is, what would you think how big is some preachers faith that carries a 6' foot tool of faith!

The SHIELD
Wolfwood pretty often uses the cross as a shield when in heavy fire. First thing you can notice here is that there is no visible damage or scratch marks after all the hits that it recieves. This is due to outside alloy which i dont know what it is but it is obviously somekind of  incredibly durable and solid metal. Probably equal to our Titanium or Mytrhil from fantasy series! Also because of the stuff that is inside this outer alloy is incredibly thin, where maximum thickness comes to be about 1''. Also flexibility is a great factor in the shield (outer part of cross). AS you can see in the anime the cross has ability to generaly transform depending on the function that Wolfwood is using. this would be almost impossible to do in the real world so it is jus another additional factor that proves that this metal that has been used is somekind of futuristic metal nonexistent to us or even some alien origin alloy!

The TRIGGER/ SWITCH CONSOLE
There is a pretty good picture of the switch console on the breakdown picture of the cross. It is highly recognizable due to its SKULL shape. Some consider it an amblem of Nicholas D. Wolfwood but it is actualy a switch console. It changes its functions and looks according to the action! If you looks closely each of the "eyes" is the triger for a weapon and the mouth is the main switch as well as the opening mechanism for the weapon storage and the ammo storage area! Middle area in the shape of "nose" is the transforming trigger