Troy's answer to magpul - the big thing about the new mag is a slimmer and smoother profile. There is not a big base plate which make magazine pouching difficult.
The new battle ex series of collapsible butt and grip. The grip is super small to allow shooting hand to be as upwards as possible.
The battle ex stock has a steel butt plate with storage area. Designed to be mortared.
Mini 14 version of the battlestock
M203 vertical lever system that allows the grenadier to open the M203 breech with the supporting hand on the vertical grip.