You will have to call COLT
Colt data at Proofhouse.com
You will have to call Colt to find out.
You will have to call Colt with the sn to find out.
You will have to call Colt to find out
AR-15 is a trademark owned by Colt - thus, no other manufacturer may market their rifles as AR-15 unless they are specifically licenced from Colt to do such. LAR-15 is simply Rock River's alternative name to "AR-15" in order to avoid infringing on Colt's trademark.
Proofhouse.com has Colt sn tables. You can also call Colt and they will tell you.
Colt has not offered a AR15 in 308
The Colt AR-15 rifle with Serial Number 100677 was manufactured in 1962. Colt's production of the AR-15 began in the early 1960s, and serial numbers from that period can be referenced to determine their manufacturing dates. For precise information, it’s best to consult Colt's official records or a reliable Colt AR-15 serial number database.
You need to call Colt
you will have to call Colt to find out.
You will have to call Colt