BCM MK2 16-inch on a Rock River Lower with Sig Tango MSR

A clean 16-inch rifle: a BCM MK2 mid-length upper with an MCMR-15 rail on a Rock River lower with Rock River's two-stage match trigger. A SureFire WarComp, a BCM carrier and charging handle, Magpul MOE furniture and a Sig Tango MSR 1-8 complete it.