Adapts upper receivers with .250" takedown pin holes to fit old Colt lower receivers with 5/16 (.312)" front pivot hole diameter.
Material: Hardened Steel Finish: Black Oxide
Adapts AR-15 Upper Recievers with 1/4" (.250) Takedown Pin Holes to Fit Colt Lower Recievers with 5/16
" (.312) Front Pivot Hole Diameter
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