Can you load this rifle one handed?
Is it possible, sure. Definitely wouldn't be easy though without something to hold the gun
Is it backyard friendly?
Depends on your neighbors, it pops a little, but not too much to disturb any of mine and they are around 30 yards away on each side.
can you refill this air gun with a cheap bike pump? or a small air compressor?
You would need a pump or compressor capable of putting out 2000 psi or more.
Does the scope come already mounted as part of the $179 kit?
Does not come mounted, but the scope and rings are included
Im brand new looking for my first pcp... i was told to get the discovery .22 but then i see this...??
Depends on what kind of shooting you want to do. If I was looking to do any kind of small game hunting or pest control, the discovery would definitely be a better choice than the Wildfire.
Does this rifle have attachments for a sling, or would I have to modify it?
It does not come with swivel studs or pre-drilled holes for them.
Why has the price jumped from $149 to $179?
It's a kit, comes with a scope and rings
What barrel? What accuracy can be expected?
It's a Crosman barrel. Check out the Pyramyd Insyder video to see how it shot accuracy wise.