As the others have stated, none of the Herlo were accepted by the government. All were rejected for one of many defects in them. A dealer got ahold of then and sold them as replacements to South Korea. They tried a few and sent them back. The next trick was to start stamping them with USGI acceptance stamps and then sold them here as replacement. Junk from start to finish. One well known carbine collector installed a brand new Herlo barrel on his M2 to see how bad they really were. After shooting a 30 round magazine at a large target at 25 yards, he had two hits on the paper with both of them being sideways. Best advise is to stay away from them no matter how cheap the price.