The Model 02 was a contract (#508)awarded to Colt Nov 1963. It basicly brought into light the model of the AR15/M16 that we all grew up seeing. Some were produced with the bolt closure device and some were not. 104.000 rifles were made, 85,000 with bolt closure for army and marines and 19,000 were not. I would suspect yours would have made it's way to the UK after being supplanted by later generations of M16 and the older ones could be surplused.Information
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