No.
If it is one of the recent Colt .22LR AR15 rifles, then the answer is no - they are completely different internally.
Yes
No. A standard AR15 has a buffer tube that runs inside the stock that contains the recoil spring.
The stock and forearm were traditional wood, but can be other materials. With the AR15 and M16 rifle, they are made from metals and plastics.
That's a smoking deal on the Mosin-Nagant. That's the one I'd go with.
The typical AR15 fires the same type of bullet as the M16: a .223 caliber (5.56mmx45mm NATO) round. There are AR-15 rifles that have special barrels made for a variety of popular cartridges, even the little .22LR.
Try AR15.com Try AR15.com
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
By it's serial number. Go to www.proofhouse.com and under 'long rifles' listing look for AR15 Sporter