I purchased a Bushmaster M4 "Optics Ready Carbine," brand new, about 6 month ago. I have only taken it out twice and maybe put one hundered rounds though it at most.

The problem I am having with it is I am getting frequent failure to feeds and failure to ejects. When it fails to eject it will try to feed the next round into the chamber and force the spent shell up in between the bolt and the charging handle.

Usually I can just pull the charging handle back and lock the bolt back and the spent shell will just fall out but the last time it jammed the shell was jammed pretty well and it took me and a friend 10 minutes to be able to clear the shell.

When the failure to feeds occur it will fully eject the spent casing. I have only used Remingtom 55grn rounds and have cleaned and oiled the gun very well after the first trip to the range. If anyone could help me out or lead me in the right direction I would greatly appreciate it.