The 510 has a shroud & it's also a non threaded barrel right? Its the shroud with the thread? If that's the case you may be able to shorten the length & use a std mod (or short if you want really short) in the same length as the shroud & a short mod using this style of home made shroud:
https://youtu.be/AtmWtL4oJ8U
I did a slightly different version of this which acts like a reflex mod, by drilling out the barrel adapter to alow the air to pass in between the barrel & the carbon tube. I'm not sure if it's quieter or not but it definitely catches the air. This mod was brilliant.. it shortened the rifle by loads & made it alot lighter on the front. I'm wondering if it'll work on the aa510 the same.. all you need to do is buy a tube the same size id/od as the steel shroud you have & buy a jsr barrel adapter.
Rhys