M16 attachments

What is the best attachments for an m16 right now I have nothing

Depends on what you want from the m16 and how much you are willing to spend. Do you enjoy a bit more power? Maybe a bit more accuracy? Or possibly a higher firing rate... Could you be a bit more specific on what you really want from it?

I meant externally

Alright, well you have a few options externally. If you don't have one already you can install a rail system which will allow you to fit several things such as flashlights, bipod, foregrip and other things such as that. You can also install a rail for a sight on the top of the gun where you can place a red dot site or whatever you may choose. You can a new flash hider which will enhance the look of the airsoft gun as well. Your best choice is to go online to a trusted airsoft retailer and look around at what they have for m16 models. Hope this was some help to you. Without more information on what guy you actually have, I can\'t list specific items with links on where you can get it.