Sig mpx Rail and silencerco piston for suppressor. 15 inch free float rail, spikes tactical barking spider will accept up to 9mm, sig 365 9mm muzzle break, tactical knee pads, tru glo red dot, ar15 front crosshair sight,brand new magpul ar handguard, brand new limbsaver recoil pad. Let me know what your interested in and I can shoot you a price. I'm looking for a LH thread9mm muzzle device that is compatible with a silencerco hybrid suppressor or the same in RH threads for 556.