Colt has not offered a AR15 in 308
If it is one of the recent Colt .22LR AR15 rifles, then the answer is no - they are completely different internally.
You will have to call Colt and tell them the serial number.
Call Colt and they will tell you.
Proofhouse.com. Call Colt also.
@ 40 inches.
The AR15 series
Proofhouse.com has Colt sn data.
You will have to call Colt and provide the serial number to find out.
What is the manufacture date of a Colt AR15 rifle serial number 192754 model SP1
Try AR15.com Try AR15.com
Yes, unless you are a felon or live in California. California residents must purchase an authorized version of the weapon. The only difference is that the weapon does not have a detachable magazine (internal capacity 5 rounds). Another thing to be wary of is that for some reason people like to tamper with the AR15 to make it full auto. That is illegal, and to own one that has been tampered with will get you in big trouble with the BATF unless you purchased it through legal channels and have the weapon licensed to you.