Flux Defense just took the wraps off their latest – the MP17. In their words:
The FLUX MP17 for SigP320™️series or M17. Drop your fire control unit into the SBR stock version or pistol brace version. 43 rounds – Mount almost any red dot – Duty holster that works with most pistol lights – QD mount for a sling. Patent Pending. Made in the USA.
Flux Defense also released a holster for the MP17 right out of the gate. The pistol version is available initially with plans for an SBR version in the near future.