Through an estate, I received a Colt AR-15 Model SP1, serial # SP52xxx. Gun mounted with a Colt 5x20 scope, no forward assist.
Lower receiver markings: right side: nothing
left side: AR-15 COLT'S PATENT FIREARMS MFG.CO.
CAL.223 HARTFORD, CONN.
MODEL SP1 U.S.A.
SER. SP52xxx
Barrel: markings: MP Chrome Bore
How do I research the date of manufactured and value? Don't believe he ever fired the weapon, many types of ammo in his house but zero .223 rounds.
Thanks
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