3FTech Gripstop by FFFTech/FFFTechnology Is it a undersized foregrip? Is it an oversized handstop? I don't know to be honest, so I'm just gonna say it's both! The foregrip/handstop/wHat has ridging down it's front to allow the support hand to rest against/grip the design with greater traction than say, if it was smooth. Printer Used: Monoprice Maker Select Plus Filament Used: PLA+ Print Settings: Extruder: 210C Bed: 56C First Layer Print Height: .20mm Standard Layer Height: .14mm Wall Thickness: .40mm Wall Perimeters: 4 -5 Infill: 25% Infill Pattern: Gyroid Material Flow: 100% Support Material Percentage: 30% Print the Gripstop upside-down. Hardware Needed: 2x M5x10 Hex Socketed Machine Screw/Bolt 2x M-Lok T-Nuts (Be sure both bolt & nut are the same thread pitch.)