"If Only You Knew" Grips (AR-15): FFFTech/FFFTechnology An AR-15 grip that widens substantially from ~22mm to 25.4mm. Has a rounded backstrap and heel; as well as a curved grip frontal section. A newer feature for most 3FTech grips going forward is the reinforcement strut at the inside bottom portion of the design. Comes in two varieties: *Standard *Ridged Printer Used: Monoprice Maker Select Plus Filament Used: PLA+ Print Settings: Extruder: 218C Bed: 56C First Layer Print Height: .20mm Standard Layer Height: .16mm Wall Thickness: .40 Wall Perimeters: 4-5 Infill: 25% Infill Pattern: Gyroid Material Flow: 100% Support Material Percentage: 18% 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