RI circle gas block forge code Colt AR-15 M16A2. History of Providence Tool Company

Answering the question of what manufacturer makes the RI circle A2 gas blocks on Colt ar-15 from mid 1980s - early 2000s. Often seen on Colt match target rifles, Colt carbine sporter, Colt AR-15A2 sport II, etc. Predominantly through the ban era.
This also goes into the history of Providence Tool Company and Providence Tool & Nut Company, along with the manufacturer that made those gas blocks for colt ar. #m16 #coltsp1 #m16a2 #m16a4 #colt #arfcom #ar15

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