Soon to be released is the new integrated system M4 / AR15 Shield Mount. This system will allow the operator to attach a ballistic shield directly to the lower receiver. Benefits include consuming less space on the rail, bringing the shield closer to the operator allowing for a smaller shield profile with an equal amount of protection as larger shields and shaving off even more weight than ever before.
Expect availability by Jan 2018. Pre-Order starts Sept 1st. Prices to follow soon.