Why Can't I Sell That Damn Upper?

[clinotus]

John, Glad it moved for you.

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That being said, if this method really works, I've got a 99 Dodge I've been trying to sell for the last 4 years...

 

[vicpinto]

So when someone mentions M4 feedramps they are specifically referring to JUST the M4 barrel extension as noted above in the "Ok" picture and not the combination of the cuts into the upper AND and an M4 barrel extension as noted above in the top right "Good" picture.

I am just trying to get my terminology straight.