the store
Walnut, California has a big airsoft store called Airsoft gi.
There are plenty of p90 airsoft guns out there. I recommend searching "airsoft" in google maps. Once you find a store, check their website for the gun of your choice. Hope I helped.
Illinois
The probability of it being legal is quite high, seeing as Airsoft is legal in the state of Illinois.
Try a sports store
A person can buy airsoft rifles from an airsoft store, gun store, and a sport store. They are all reflective cheap in every store depending on the model you wish to buy.
Airsoft GI, or Evike
Depending on what model, you may be able to find a replacement at a hardware store.
Want ad, pawn shop, department store
You can purchase MP5 Airsoft guns from Amazon, ebay, and many other online retailers. If you can find a local sporting goods store, you can see if they sell MP5 Airsoft guns.
yes