Kodiak Brown Aero M4E1 10.3-inch with Geissele MK4 DDC

A short 10.3-inch rifle on Kodiak Brown Aero M4E1 receivers that happen to match a Geissele DDC MK4 rail and 10.3-inch barrel. It runs a B&T hydraulic buffer, a RISE RA-535 trigger, Driven Arms grips, a Vortex UH-1 holographic sight with an HM3X magnifier, and an FDE Otter Creek Labs Polonium.