This would be my first time trading a gun.What paper work would I need to do so?

Pistol or rifle?

Pistol

What are you trading for a pistol or a rifle?

Buyer (in this case receiver) of firearm needs a P2P,  If you are trading handgun for handgun you both need a P2P,

I just a glock 22 for a glock 17

Yep - both of you need P2P's

13 hours ago, Ruger973 said:

I just a glock 22 for a glock 17

Just swap barrels.  No paperwork needed.

5 hours ago, PK90 said:

Just swap barrels.  No paperwork needed.

I wish it was that easy...C.Y.A!

I wish it was that easy...C.Y.A!

It is. [emoji12]

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1 hour ago, Ruger973 said:

I wish it was that easy...C.Y.A!

It is that easy! Only issue you might come across is the ejector...But thats an easy fix. I doubt you would have a problem though. 

Agreed 

I'd think swapping entire uppers would be better.  The OD of the 40 cal barrel is different than the 9 if I'm not mistaken.   There are a few Glock armorers on here to correct me if I'm wrong.  However, the frames are the same so the slides will swap.  

Yeah. Forgot about that.

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No different then purchasing a caliber "exchange" kit.

15 hours ago, Ruger973 said:

I wish it was that easy...C.Y.A!

.