The Colt CM5 carbine went on sale today at Arms Unlimited. The quantity is limited.
https://www.armsunlimited.com/Colt-M5-Carbine-Patrol-Rifle-p/cm556-16-m5s.htm
The Colt AR-15 Resource
"A site dedicated to the history of the Colt AR-15 rifles, carbines and associated items"
The Colt AR-15 Resource 
I was just looking at and researching these! Thanks!
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An SBR of the M5 in 9mm is definitely on my wish list.
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We might see one. Fingers crossed.
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