Used CMMG MK4 in 300 Blackout cal, 16 inch bar, 16 inch optic ready hand guard, very good condition, no scratches, rust or dings, 20.00 shipping, ship to FFL dealer only, payment by cert. check, money order, personal check or Zelle accepted, personal check requires clearance before shipping, ship by UPS with tracking no. as is no exchange.