You need to change the name of the add-on to Weapon_ArcWeaponry or something.
The " ' " from "Arc's" is throwing off the code, it thinks you're closing the single quotes (the ones that start at '<bitmap:blah...).
As far as the actual weapons go,
The models are really nice. However, there's no way I'd ever use them, they're simply too generic. People need to stop making AK4026924s and HCKTHT92890462s and start making orignial, colorful, creative weapons. Take a look at Bushido's old stuff (not the stuffty T+T) to see what I mean.
That's just my opinion. I'm sure you'll find tons of people willing to download YET ANOTHER pack of realistic, grey and black weapons.