Add to Cart Quick view Tyrant Cnc , Tyrant Tdechemagex17grey Spg Echelon Mag Ext TYRANT CNC MSRP: Now: $51.79 Was: The tyrant cnc magazine extension are designed to increase the ammunition capacity of springfield armory echelon's 15 and 17-round magazines by an additional 5 rounds of 9mm.Each springfield armory...