How much do you want to spend? DPMS, CMMG, Double Star, Colt, Les Bauer, POF, Bushmaster, LMT, Noveske... all make AR-15s in different price ranges. All do what they're supposed to.
AR15.com has a good listing.
Try AR15.com Try AR15.com
If it is one of the recent Colt .22LR AR15 rifles, then the answer is no - they are completely different internally.
VitaMix is a good brand of blenders.
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
Yes it is a good brand.
Yes They Are Good Brand.
By it's serial number. Go to www.proofhouse.com and under 'long rifles' listing look for AR15 Sporter
Depends on model.