It depends on you local laws and your parents.
All guns use gun powder except Air guns and Air rifles
If you want to build your own air gun I suggest you search" You tube" and look for "Home made air guns'
Most "PUMP" air guns use the for-arm (Forward Handle) to pump the air gun.
No
You can't. You will have to sell your old air gun, then use the money towards a new PCP air rifle.
It depends on the gun, but "both" is an acceptable answer.
There are many place to purchase a soldering gun for home use. The best place you can buy a soldering gun for home use is Office Depot. You can also find it online at Amazon.
No. A pellet gun would use compressed air.
Yes
Air rifles use compressed air or C02 to propel the BB or pellet. They do not use gunpowder. Their is no bullet shell and bullet just the BB or pellet.
No matter WHERE you use a gun, there are laws that govern what you can and cannot do. If you do not know those laws, please do not own a gun.
you use green gas to fire the air soft gun