400-3000 or so depending on specifics
$800-$2,000.
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
$1599
Try AR15.com Try AR15.com
Average is around $350. If you are looking for a stripped lower receiver, the price should hang around $100.
If it is one of the recent Colt .22LR AR15 rifles, then the answer is no - they are completely different internally.
Both are assembly line weapons. Stag in my opinion also has a better reputation. Unless you decide to go tactical, they are all pretty much the same. Bushmaster, dpms, stag ext..
1959
Yes
As of today (10/18/08) $900 ~ $1,370 depending on condition.
By it's serial number. Go to www.proofhouse.com and under 'long rifles' listing look for AR15 Sporter