Cowboy Joe

My M4 will not properly feed. Sometimes it does, sometimes it doesn't. When it doesn't. the shell will hang up in the carrier. It seems it either does not come far eniough back from the magazine, or the carrier pinches the front against the top. I have repleced the magazine with a full sized one, using the same spring as advised. Does anyone have any bright ideas? Thank you in advance. Cowboy Joe

Thanks all. I got one from Acme. Received two days after placing the order. They're now on my procurement list. Best, Cowboy Joe

I am looking for a straight (non-pistol grip) stock for an M4. Any help would be appreciated.