Precision Grip (AR-15): FFFTech/FFFTechnology A design created mimicking the PSG-1's grip. Has a palm rest that can be adjusted vertically, and also can be adjusted for different pitch and roll angles. The top of the grip area has thumb rests that extend 9mm forward. Has wide finger grooves. Printer Used: Monoprice Maker Select Plus Filament Used: PLA+ Print Settings: Extruder: 216C Bed: 56C First Layer Print Height: .18mm Standard Layer Height: .16mm Wall Thickness: .40 Wall Perimeters: 4 Infill: 25% Infill Pattern: Gyroid Material Flow: 100% Support Material Percentage: 20% (Support material only needed for finger grooves, underside of thumb rests, and through bolt slots.) Hardware Needed: 1x Allen Head Screw, 1/4-28 x 1" 1x Steel Star Washer 1x Safety Selector Detent Pin 1x Safety Selector Detent Spring 1x M5x40 Hex Socketed Machine Screw/Bolt 1x M5 Hex Nut (Be sure both bolt & nut are the same thread pitch.)