Alpo is right on the money with his answer.
From FM 23-5
"19. Malfunction
A malfunction is a failure of the weapon to operate satisfactorily. Some of the common malfunctions are discussed below.
(a.) The clip may jump out on the seventh round. This is usually caused by a bent follower arm or bullet guide and can be corrected by replacing them."
You can find the field manual at
http://www.biggerhammer.net/
This post has been edited by andy2205: September 26th 2009 1:00 PM