Knight's Armament Forward Pistol Grip Vertical Grips - MOD Armory

VISM by NcStar Picatinny Ergonomic Angled Foregrip w/ Storage Compartment (Color: Black), Accessories & Parts, External Parts, Vertical Grips and Hand Stops - Airsoft Superstore

Blackhawk 71VG00BK Rail Mount Vertical Grip Black Polymer

Knight's Armament Vertical Forward Pistol Grip

AIM Sports 4 Picatinny Vertical Grip (Model: Without Rail), Accessories & Parts, External Parts, Vertical Grips and Hand Stops - Airsoft Superstore

Reptilia CQG Pistol Grip, Black

Knight's Armament Forward Pistol Grip Vertical Grips - MOD Armory

A.R.M.S 実物 Throw Lever Pistol Grip フォアグリップ #23 M4A1 KAC ARMS Knights - ミリタリー

Knight's Armament Forward Pistol Grip Vertical Grips - MOD Armory

FAB DEFENSE FX-FGGSB Tactical Folding Foregrip For Handgun/Rifle Polymer Black

What is this thing on CA compliant rifles? : r/liberalgunowners