Gearbox metall Alpha Parts Systema PTW Compact Carbine DYTAC SMR MK1 Tanaka Works MK16 M-Lok 13.5 Systema PTW Systema PTW Alpha Parts PTW Systema PTW Systema PTW Systema PTW MK16 M-Lok 13.5 PTS Low Profile PTS Centurion Systema PTW MK16 M-Lok 9.3 G P TD Griff Systema Bolt Magpul PTS EPM SMR 416-Style Systema PTW Ares M320 Best Gun Scope PTS EPS Polymer Systema PTW G P XM177E2 Magpul PTS MOE Dytac Barrel Systema PTW ETiny PTW Motor Systema PTW Systema PTW FCC CNC Systema PTW DYTAC SMR MK4 Alpha Parts Magpul PTS PMAG Systema PTW TW5 Systema PTW Ares M320 MK16 M-Lok 10.5 Systema PTW FCC CNC Compact Carbine