While I can not find the episode online I did see them do a torute test on the tv of the m4. It concluded with a 20 gauge shell being loaded first and then a 12 gauge shell being loaded and fired and the gun worked with out a issue. One of the reasons why I purchased mine. Not sure if it was guns andammo or one of the other shows that did it. Which ever one has the big guy in a lab coat testing/torturing new guns.
Can you post a pic? Does the Eotech ride ok on the m4 and did you replace your rail? I have yet to decide on an optic but it is the last peace to my m4.
At least American Guns has a hot blonde; I have to admit I liked SoG until they turned it into the bachelorette for a crooked toothed bayou nag. Great pic btw, did she just get hit with a Benelli stock or is that her natural allure? She looks like Marilyn Manson trying to wake up from a hard night of man lovin'.
I have heard great things about federal flite control. Hornady Critical Defence and Zombie Max, which are the same round do well up 25 yards in mine. I shot at a antifreeze jug 100 yards and while no direct hits I would not have been happy to be where the jug was. The pro to these hornady rounds is the 1600fps velocity, draw back is it is 8 double 0 slugs. I am happy with the round over all.
I have not had any problems with FTE or FTF in my M4 using 2 3/4'' #7 shot until last weekend I was shooting some old #8 with a few FTF. I then ran some Zombie Max 00 with no problems. I attribute this to the bolt not being well lubed. Miltec and away I go for a new box of cheaper bird shot just to warm up the miltec. Lube is your friend for sure along with all the other comments to take into consideration. But with a dry bolt things are harder moving.