Originally Posted by Jaeger
Do you have anyplace with a supply of stocks and extension tubes? I've seen enough variences in them that you may be able to come up with a combination that is fairly snug.
i actually just went through my own supply with a caliper and did find a pipe that snugged the stock up better.. had 5 extensions varying from 1.1450 to 1.1500, it now wears the 1.15. still rattles, but it's better.
i'd still really like to know if anyone is making upgraded M4s though.