It is +20 attack and +20 defense which is basically the same as the chain gun --- NO you are not correct about that. The chain gun is 16 attack and 14 defense.
You unlock it at lvl 99, buy it for $200,000 and have a upkeep of $2,500.
Exception to this ... there was a "crack" exposed that allowed players at lower levels to acquire the bonus weapon.
To get the bonus weapon on Mafia Wars you have to make it to level 99.
The Attack is 10 and the defense of it is 15.
The stats of the bonus weapon are: 20 : ATTACK 20 : DEFENSE Better than the chain gun.
You can get bonus items on Mafia Wars by buying them with reward points and getting to higher levels. You can also confirm your email address which will allow you to get the bonus mail truck. Level 99 is when you can get the weapon titled "Bonus Weapon".
When you reach level 99 on Mafia Wars you can unlock more inventory items and you get the weapon titled "Bonus Weapon".
You must get to level 99 the stats of the weapon are 20 Attack 20 Defense It costs $200,000 each $ 2,500 upkeep
When you reach level 32 on Mafia Wars you automatically get new weapons unlocked.
The "Bonus Weapon" is available to be bought.
There is a glitch you can use to get the bonus weapon on Mafia Wars but you wont be able to use it in fights. It basically will just be there for show because Mafia Wars made it so you couldn't use it and other then that you will just have to keep leveling up and get to level 99 to get it.
The Mafia wars bonus weapon is 200,000 $ each. they have 20 attack and defence. It is in new york but a certain level must be achieved to unlock it. A photo is located at: http://mwfb.static.zynga.com/mwfb/graphics/item_minigun_bonus.gif
On level 99 you unlock a weapon called "Bonus Weapon". It looks something like a chain gun. Bonus Weapon stats: Upkeep: -$2,500 Attack: 20 Defense: 20 Price: $200,000
When you level up in Mafia Wars you can unlock new jobs and also new inventory. Some items take a long time to unlock though and you have to have a very high level experience. For example: at level 99 you unlock a "bonus weapon" which stats at 20 attack and 20 defense.