Improved Carbine Chamber ?

[McCoy]

Been looking thru Colt Canada catalog (yeah plenty of spare time with that rain )
And the C8A1, C8A2, CQB & SFW carbine all have "Improved Carbine Chambers"

What is it? Wylde Chamber or standard 5.56mm chamber.

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[NavyShooter]

Perhaps the M-4 style feed-ramp?

NS

 

[Leg]

Believe that they are referring to the chamber, not feed ramps. I remember someone (48th Highlander?) going on about the special chamber that Diemaco had developed for one of its overseas contracts.

 

[Craftsman 441]

When I took a tour last winter, I asked about the imporvements and changes that Diemaco does to their rifles versus Colt. They said that the chambers are reamed a bit bigger, chromed and then polished, so they continue to work better when they get dirty.