I don't know of any. There are integrally suppressed 9mm AR barrels but the baffles are removable as is only logical.
Why do you want this bizarre configuration instead of a normal silencer you can completely disassemble? You can't drop a whole barrel assembly into an ultrasonic cleaner, you can't replace damaged parts easily, the ONLY benefit to such a thing would be one less $200 stamp and if you're buying NFA, $200 is not a concern.>>36092495
We'll never know because Magpul was never able to produce it. Bushmaster [had] a sterling reputation for manufacture at the time so it's unlikely that they changed engineering specs to hamstring the rifle's commercial launch, but until very recently (and maybe still) the rifle has been plagued with issues. More likely the design was flawed from the start, which may be why Magpul sold it in the first place. We've never heard anything about production FMG9s or PDRs either, probably because they aren't tenable.>>36092995
In your case of family bequeathment, 18 USC § 922 (a) 3 does not apply. HOWEVER
As of 2015 California has a law (CPC 27585) prohibiting you from importing a firearm personally.
Since 2008, you also cannot (FFL) transfer a handgun into California if the sending FFL is not registered with and approved by CADOJ on a per-firearm basis (CPC 12072 (f) (1)) no matter which state the sending FFL is in. You can however transfer a gun to California as long as the sending FFL and the transaction is CADOJ-approved.
The only way around this is to MOVE to California with firearms in-hand and register them within 60 days of arrival (CPC §12072 (f) (2) (A), CPC 27560). Existing residents can't do this.
Further, and this is the catch-all, no handgun may be transferred to you by a CA FFL (as received by any FFL, CA or not) if that handgun is not on the CA approved handgun list (CPC 32000).
tl;dr You're hosed my boy, unless you want to illegally import it and gamble on not getting caught.