6mm ARC 18-inch SPR on a Geissele Super Duty Upper, Suppressed

A suppressed 18-inch 6mm ARC SPR on a Geissele Super Duty upper and an Aero lower, with a Noveske stainless SPR barrel and a JP headspaced bolt under a 15-inch Geissele MK16 rail with an Annex Arca rail and Atlas bipod. It runs Geissele's carrier, parts kit, SSP trigger and buffer tube, and wears an Arken SH4J 6-24x scope in a Spuhr mount and a SureFire RC2 can.