Oct 15, 2019 · CMMG RDB 8″ 9mm Gibbz side charging upper New Frontier Armory C-5 lower Elfman 3 Gun Trigger Elfman push button safety VLTOR A5 buffer tube Kynshot 9mm hydraulic buffer Tubb’s flat-wire buffer spring SB Tactical SBA3 Holosun HS403C. Modifications necessary: Must use Gibbz enhanced cam pin Cut BCG gas key Remove C5 lower receivers feedramp .... "/>