While I was cleaning my HK USP compact (.40 S&W) I decided to push the roll pin and take out my extractor. I noticed that it did not have a rubber extractor plug in it. I’ve only had this pistol for 2 or 3 months and I bought it used from CDNN. I’ve put about 650 rounds through it without a problem.
What purpose does the extractor plug serve? I went ahead and ordered a new plug and extractor spring just for the hell of it, but I was just curious so I figured I ask you guys this question… Thanks!