Magpul recently posted a rundown of all of the available M-LOK products to date. The list is fairly extensive and seems to indicate that the health of the new direct-connect specification is solid.
From Magpul Director of Product Management and Marketing, Duane Liptak Jr.:
Polymer rails 3-11 slot
Aluminum rails 3-9 slot
RVG Adapter for those who like the legacy RVG size/shape
AFG Adapter for those who like the legacy AFG and AFG2
M-LOK to MOE Adapter
M-LOK MVG
M-LOK AFG
M-LOK Poly Cantilever Rail/Light Mount
M-LOK Aluminum Cantilever Rail/Light Mount
M-LOK Light Mount V-Block and Rings
M-LOK Offset Light/Optic Mount
M-LOK Bipod Mount
M-LOK QD Sling Mount
Four more accessories on the way
Plus some very cool things from other manufacturersAnd for platforms, in house:
Shotgun stuff is transitioned to all M-LOK
MOE SL
MOE legacy will be transitioning soon
Lots of M-LOK compatible products at SHOTAnd over 100 manufacturers who have signed on. Not bad.
Are there any voids that haven’t been filled yet? Are you waiting for any M-LOK accessories? Which ones?
Inforce M-LOK WML
^^^This