Mid length vs carbine length gas system. Mid lengths have a softer recoil impulse.
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Iraqgunz, thanks for the prompt reply. That works for me as I am not real crazy about just dumping money. Also, thanks for the response on the recoil of the mid length vs the carbine. I will run it until it breaks and then buy something better. Have a great weekend.
Took my BM out to the range today. Completed to the best of my ability the remedial steps outlined by the OP.
Got the BCM SOPMOD Bolt Upgrade/Rebuild Kit. Basically what Grant recommended plus a new extractor & Gas Rings. New H-Buffer was also installed. Service from BCM was extraordinarily good for me. I'm much more confident that my rifle will serve me well now. 6 - 30rd. mags were fired without a hiccup. I keep seeing reference to "Recoil Impulse." That is where the improvement really shined. No more of the shake, rattle and roll I was getting from the carbine buffer. My empties are no longer being ejected into the next zip-code. Instead they're landing 5' to 6' feet to my 4 o'clock. This fact alone makes me very happy I took the time and effort to do this.
Also, could someone tell me if the feedramps on my Bushmaster are proper M4 from this picture?
Thanks!
http://i42.photobucket.com/albums/e3...M4FeedRamp.jpg
Dang, please disregard my previous entry question.
I read this thread ...
https://www.m4carbine.net/showthread.php?t=193
And answered my own question. Dang failure to use search button (FTUSB) issue again for me.