What makes a pcp a pcp?

Man that is add tedium.
Just spent the last 30min scrolling the definitions of arms act.
Got past the descriptions around weapons, but by no means got through the whole act, or followed to many ref.
But all I found was basically its a law passed and there is no definition.
I've copied all the air rifle stuff, relative to this subject so far. Anyone want to see it shout out. I'll keep looking.

Thing about the gun laws here is the average police wouldn't know the bare basics for airguns. And they seam to make the laws up as they go along as the pen pushes don't know anything.

The UK laws seam to have been set by a airgunner to allow everyone to have some fun in each category

Very nice description.
So the ability of highly pressured gas to hold its faze ability and produce repeatable high energy shots ( in rapid succession) is probly the closest I've got to a description that fits with out other air gun cross overs. Encompasses and elimates differnt propellants.
Should send that to the law makers.
Be a nice to find that on a legal description site.
To anyone who alluded to that before and I never clued on sorry.
Thanks jwabfrog I can accept that as a definition for a pcp.
Still haven't found a description in arms act.
Won't start on well why aren't pcp pistols exempt.
But definitely the definition I'll work of from now on, till I find a legal definition.

the definition of a pistol is any gun thats under 762 mm in length but when it comes to pcps the law consders any pcp airgun with a buttstock evan carbines the same as it does for those under 762mm in length as pcp rifles,if you convert any co2 rifle to use hpa its then legally considered to a pcp rifle,pcp pistols are exempt from this classification because they are not specifically mentioned in the law dispite them being under 762mm in length so are legally considered to be just the same catogory as any other air pistol,as the law dosnt mention how pcp airguns are charged any rifle that has an hpa cylander that can be filled with hpa by any fill method is considered to be a pcp rifle,the trouble with this law is that it was never thourght thru properly,so much of it is open to interpretation by nz police who then decide what the classification all airguns come under and that is how nz police administer this law,as nz police have been given total discrecression on how they now can interperate all firearms laws this is allso why replica soft airguns are now essentually banned imports as well as are allso many other types of co2 airguns,as for the rifle with the built in pump,because it has the capablity to be charged allso by other means and has an hpa cylander,nz police will consider it a pcp evan if the second charging system was removed,simpliy because it was origionally a pcp rifle,i wouldnt push that issuse with nz police the way they interperate the law these days,there are some pretty murky waters around the definition of a pcp rifle these days.

Then you can have a Marauder pistol, pcp without an FAL, but put the stock on it and you then need an FAL for basically the same thing.