A&K S24 / M24 help please

[sonofsammo]

Morning all!​

I've disassembled my A&K S24, ready to add some new parts.​

Yet I'm a little flummoxed, so need some help please.​

I know I have to remove the ridges in the hop chamber to get the barrel to fit.​

I remember someone suggesting I get a concave nub to work with the new arm, but I can't figure out how it all goes together - could anyone point me in the right direction? I've looked on youtube, but to no avail.​

The barrels look different too - the new one is open, whereas the old one isn't.​

Any help would be much appreciated! ?​

View attachment 35438

 

[M_P]

Here's a picture of a vsr 10 hop champer which is basically/actually the same. Should give you the idea

 

[sonofsammo]

All sorted, built and chrono's at a consistent 471 on .2s - happy days!
Now I just need to go somewhere I can shoot it to see what it can do.