To determine the age of a Colt AR-15 A2 HBAR with the serial number 224870, you would need to refer to Colt's production records or a reliable source that tracks serial number information for their firearms. Colt began producing the AR-15 in the 1960s, and the A2 model was introduced in the 1980s. The specific serial number you provided can help pinpoint its production year, but exact dates may require further research, such as consulting with Colt or firearms historians.
100-1000 USD or so
I just purchased one from a dealer in like new condition for $1,000. I believe that to be the low end of the value of this gun. Most in this condition will be higher.
No way to answer without the entire serial number. You can call Colt and they will tell you.
You will have to call Colt. Sn goes beyond published data.
You will have to call Colt to find out.
Yes
You have written your question in a way that guarantees it can not be answered. In order to answer your question you left out the most important piece of information. You did not provide the serial number. Serial number data has been published in many books. The Blue Book of Gun Values is one. Alternatively, you can call Colt with he serial number and they will tell you.
600-1200
100-1500 US dollars.
any 5.56 or 233 caliber ammo
Colt made a special collar that slid on the barrel about 1.5 inches behind the barrel. The collar had cut to limit the cant of the bipod and was held by a roll pin. The version I saw was on a special HBAR barrel (.750 dia.). The standard M60 bipod fit between the collar and the flash hider.
Model 6601