The Marines are wanting to suppress all the things
The Marine Corps has posted a Request for Information on commercially available suppressors that can work across all of their 5.56mm platforms.
The RFI, posted Aug. 3, is feeling out the industry for current availability of a detachable suppressor capable of reducing the sound of a 5.56mm round to 139dB. To be used by the M4 and M4A1 carbines, as well as the M27 Infantry Automatic Rifle — a select-fire HK416 — the Corps is interesting in buying in bulk.
Like 194,000 in bulk.
More in my column at Guns.com