About 3 weeks ago I put together a 4.5 inch AR 9mm pistol. I got the glock lower from palmetto but they were out of uppers so I found one on Delta team tactical. I ordered there upper, a upgraded bolt and an upgraded charging handle. Got it put together and thought the bolt looked odd as you could see the firing pin. First day out the charging handle fell apart and the spring and latch went flying. So I grabbed a standard one out of the parts bin. I probably shot 500 rounds out of the gun and usually once or twice every mag id get either a case stuck in the ejector port or one left in the chamber. I noticed the "UPGRADED" bolt was rough and had chatter marks on it and it rubbed hard and gouged the ejector bar. So over the next few days I shot it and filed and polished the bolt and ejector bar till it didn't rub anymore. It was more reliable after that but still wasn't a 100 percent. I had the cheap clear mags so I figured maybe that was the problem so I found a couple glock mags and figured that would do it but it didn't help a thing. So I figured it was the bolt so I started researching another bolt. I went and looked at the company that made the bolt I had and I saw on it where it said it used AR15 extractors. When I got this thing I kind of shook my head because it didn't have an extractor. I figured maybe with blow back it wasn't nessisary. I got looking at my bolt and low and behold there was a hole for an extractor pin. I went in my parts bin and grabbed an extractor and it fit right in the bolt. I had been shooting the gun without an extractor? they had forgot to put one in it at the factory. I got ahold of Delta and told them they sent me a faulty charging handle and a bolt that was suppose to be a premium piece that was rough everywhere and didn't even have an extractor. They said if I wanted them replaced I had to send them back. I told them that I wasn't going to start all over with another crappy bolt and didn't want a charging handle that could fly apart. told them if they wanted to do right to send me a different charging handle. Well they told me to basically shove it. Its a 20 mile round trip to get to the PO and it just wasn't worth the hastle. Learned three things. A 9mm bolt has an extractor , premium doesn't mean premium and most importantly that delta team got the last penny I'm giving them. The real sad thing is palmetto didn't have them in stock so I bought it there because they said they did. It took me over a month to get it and that was even after a half a dozen emails asking where the heck it was. In that time palmetto had them in stock twice!! What is amazing is this little gun ran about 28-29 out of 30 times without even an extractor in it! I would have never guessed!! Sure reinforces my opinion of my gunsmithing skills too