You could always post your question to answers.com
You will have to call Colt and provide the serial number to find out.
You must call Colt to find out.
You will have to call Colt to find out.
Try AR15.com Try AR15.com
No public data- but you can contact Rock River customer service
If it is one of the recent Colt .22LR AR15 rifles, then the answer is no - they are completely different internally.
1959
Yes
The US Army presently uses the M4 carbine, a shorter and much modified version of the Armalite AR15.
Colt has not offered a AR15 in 308
I would contact Rock River Arms directly.They will have the info that you seek.
By it's serial number. Go to www.proofhouse.com and under 'long rifles' listing look for AR15 Sporter