AR Sponsor
Posted: 12/7/2005 3:55:31 PM EDT
|
Hey Guys, Well, I could use some help. I have been having some ejection problems, I think, with my 9mm setup. I have a couple of Colt 10.5" 9mm uppers for my Colt M16 RR. Both have ramped bolts. I'm using a MGI rate reducing buffer with a standard carbine spring in a BM six position stock. I have a Colt drop in from the bottom magwell adapter. I have slightly channeled grooves for the rounds in the feedramp. I got a Haun drop in from the top magwell adapter in a trade so I tried it to see if it made a difference. It seemed to function about the same as the Colt. I have a bunch of Colt factory 32rd mags and a couple of Beta C mags. The problem is intermittent. Sometimes I can dump a whole Beta C and other times I get 3-4 jams in one 32 rd mag. It has been very frustrating because some times it works and other times it doesn't. Typically, the spent shell doesn't eject of and gets in the way of the new round chambering. Accationally the spent shell will get caught above the bolt where the carging handle rides. It did this with both magwell adapters. I have been using Federal 124gr round nose FMJ 9mm. The Federal 115 didn't seem to have enough to cock the hammer all the time. I had been using Winchester white box. It made the gun very dirty but with run about the same as the 124gr. If you had any suggestions I would appreciate it. Thank you for your thoughts and suggestions. |
|
Check your extractor pin. I had the same issue with the spent shell jammed in similar place. The cause was the extractor pin backing out causing a failure to eject problem. I’ve found that once the extractor pin backs out toward the top of the bolt and is no longer holding the extractor in place the extractor will slide freely in the bolt assembly. This causes the extractor to let go of the spent shell before it can make contact with the ejector and thus leaving the spent case in the receiver causing a jam upon the feeding cycle. I'm using a RRA 9mm buffer and have checked and made sure the free length of the action spring is within spec ensuring normal bolt speed during firing cycles. ETA: My FTE problem started out a few rounds per the entire shooting session. When the pin eventually completely backed out, the jamming problem was every 2-3 rounds fired. |
AR Sponsor