Not if it depends on combustible gas.
It didn't replace any gun, it was the first rapid fire weapon to be made.
Its deep in the first planet. You should find it on the ground. Its on the same map as the mushroom SPT
aim good
Yes, there are some guns designed to do that.
When the short & wad do not exit the barrel when fired, you have a squib fire, on any gun.
You might possibly be able to get it to fire, but you should never try to fire any ammo from any gun other than what it's designed to fire or what the manufacturer says it will fire. It might damage the gun or hurt the shooter.
Any gun store or major retailer should carry a fire proof gun cabinet. Also you might be able to find one in stock at amazon.com.
There is sort of two answers. Some guns can fire if dropped, however, any modern, properly designed gun will not fire if dropped, unless there is some sort of mechanical problem.
You don't do it any good.
dry fire it without any BB's
You can go to any of the three planets in any order. Jungle Planet X-15 Y-15 Ice Planet X-73 Y-83 Fire Planet X-83 Y-20 (The fire planet is the hardest, but you must beat all three.)
It depends on what you mean. You can fire a gun anywhere, however, it may or may not be legal depending you where you are and what the local gun laws are AND it may or not be safe, depending where you are. Check your local gun laws and be sure you can safely fire the gun without damaging any property or other people.