How to distinguish cylinder heads?

[monster007]

Does AK cylinder head has long type and short type? AK ones basically use in what type airsofts?
Does M4 cylinder head has long type and short type? M4 ones basically use in what type airsofts?

Does G36 cylinder head has long type and short type? G36 ones basically use in what type airsofts?

How to distinguish AK, M4 and G36 ones

[voorhees -FWA-]

AK and G36 are version III cylinder heads and M4 is version II.
Although my cylinder head in my G36C broke and when I went to replace it with a version III, it was too tight for the nozzle (it wouldn't allow for free movement of the air nozzle once the gearbox was back together). I replaced the head with a version II and it's working quite well.
The brass piece that holds the nozzle will typically be longer on a version III.
The air nozzles are also different, not only for each version, but also for each product.

[monster007]

Originally Posted by voorhees -FWA-

AK and G36 are version III cylinder heads and M4 is version II.
Although my cylinder head in my G36C broke and when I went to replace it with a version III, it was too tight for the nozzle (it wouldn't allow for free movement of the air nozzle once the gearbox was back together). I replaced the head with a version II and it's working quite well.
The brass piece that holds the nozzle will typically be longer on a version III.
The air nozzles are also different, not only for each version, but also for each product.

Thanks for your reply. May I know do they have diderents on the hole and the hole on the side of cylinders? Do you have pisture for them?

[monster007]

I found some picture of the M4, AK and G36 cylider heads.

The blue one is AK, the red is M4 and the golden is G36.
http://i1192.photobucket.com/albums/...raliang/AK.jpg
http://i1192.photobucket.com/albums/...raliang/M4.jpg
http://i1192.photobucket.com/albums/...aliang/G36.jpg

How can I distinguish them? They look the same.