The RemSport MFG replacement barrel for the GLOCK G17 is not one to be take lightly. It is Made in the USA, CNC machined from 416R SS bar stock, CNC vision and probe QC process, gas vacuum heat-treated and double-tempered to mitigate stress. The cut rifling is in 1:16LH twist for improved accuracy. All this is done to give you the very best in barrels.Note: Not available for international sales.