Any modern assault rifle is compatible with a foregrip, especially after receiving a handguard replacement. This one from Lancer Tactical is in OD Green, but its the same design as the Dark Earth one. However, it blends into forest environments better.
This foregrip is made of a light polymer, compatible with your guns Keymod slots and no other systems. It may almost be weightless, but it stays attached firmly and helps with recoil control. Hitting long-range targets becomes easier with this foregrip.
The grip has two storage spaces, allowing you to carry small batteries for your other accessories. For example, you can keep some CR123 batteries for your scope or flashlight.