SR-25 receivers

[ujiro]

Hey everyone.
I've got a G&G SR-25, and I was just curious as to whether the receivers from other companies' SR-25 models were compatible with the G&G.

G&G uses a standard V2 gb with a long air nozzle. I know the other companies like G&P and CA use some lengthened V2 gb, but can a standard V2 fit in those bodies, with this longer airseal nozzle?
I am unsure of the A&K SR25 what type of gb it uses, whether it is a v2 with a lengthened nozzle, or one of the long gb's.

I am curious because the quality of the receiver of the G&G SR25 is a little weak to my liking, I want something made out of a nicer metal. So if one of the other receivers will also fit, it would be nice to be able to try and find one to replace it.
So if anyone knows anything, let me know.

Thanks