What a bunch of slackers. Here is the video I meant in my question. Cleaning instructions for colt m4 22lr

http://www.youtube.com/watch?v=-zhVBY6e1n0

A boresnake makes cleaning the barrel much easier.


I use a wood dowell rod to "tap" out the pin without leaving a mark on it.

I actually take it down a step further every once in a while to clean it... but when you do that you have to watch you don't loose this little spring that is right adjacent to the chamber. It is a real pain in the butt to get back in.

Hello.
I have used diferents types of amunitions in my M4, only with CCI mini mag have correct function...
Sorry, my english is poor..or bad...no se como se escribe!
With, Remmington, or winchester,the M4 function bad (no alimenta o percute correctamente)

try to losen or tight the bolt spring screw.
mine eat almost all kinds of ammo, minimag, ordinary and even subsonics (work well with silencers )