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Posted: 10/28/2004 5:15:33 PM EDT
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My M4 build is functioning reliably, but the cases are ejecting forwards rather than to the side/back as my other ARs do. As a result, the front of the ejection port (i.e. the end nearest the muzzle) and the right side of the delta ring are getting a lot of brass marks and even getting a bit dinged up. I'd like to fix this. This rifle has a carbine buffer tube and I am using an H-buffer with standard buffer spring; I tried a standard CAR buffer too, but this did not make a difference to the ejection. The bolt is already fitted with a Colt M4 extra power extractor spring. The ejector seems to work OK (not hangups, quite forceful), and cleaning/lubing it made no difference. My next step is to switch the whole bolt/carrier group and/or lower with that from another rifle that ejects "correctly". Can anyone help me understand this phenomenon better and home in on the likely cause a bit more ? |
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Go here and read the Armalite Tech Note 34. It says it is about the AR-10, but applies to the AR-15 type rifles, too. www.armalite.com/library/techNotes/tnote34.htm |
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