I have the Mesa Tactical buttstock adapter mated to an Endine recoil reducing stock tube and a Magpul ACS stock slipped on there. Added a Magpul MIAD, Mesa Tactical 4 shot sidesaddle, Botac Tactical KZ railed forearm with black ladder rails and a Nordic Components front side rail. Its outfitted with XS site blade up front and XS Ghost ring in back. I plan on putting on a EOTECH XPS2-0 in the near future.