CDM Gear is about to release their MTRS Shockwave Light Mount for the Mossberg 590 Shockwave. The mount features two sling loops, one of which also serves as a handstop, and a short rail for mounting a weapon light. The footprint of this mount is optimized for use on the Mossberg 590 Shockwave.
They will be offering the MTRS Shockwave Light Mount as part of a special combo at a reduced price for those who sign up for their waiting list. The combo will include the MTRS Shockwave Light Mount and a Delta Wave Safety at a discounted price. You can get on the waiting list by emailing firstname.lastname@example.org.