1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

How do I get a non-colt lower to fit an older Colt upper with large pin size?

Discussion in 'Rifle Country' started by dodging230grainers, Oct 11, 2008.

  1. dodging230grainers

    dodging230grainers Well-Known Member

  2. Art Eatman

    Art Eatman Administrator Staff Member

    Either drill the lower or get bushings for the small pins.
  3. Shade00

    Shade00 Well-Known Member

    Go here. Get the Offset Bushing listed about halfway down.
  4. B.D. Turner

    B.D. Turner Well-Known Member

    This is what we did back in 1984, Find a piece of copper tubing and cut it to size to fit into your lower. Take a drill bit and slowly open up the inside of the tubing until the pin fits. This was a common issue in building AR's from mixed parts
  5. Art Eatman

    Art Eatman Administrator Staff Member

    Thanx, Shade00.
  6. dodging230grainers

    dodging230grainers Well-Known Member

    Just making sure, the link I provided to that 6520 Upper does in fact have the smaller pins, right? Even though it says new production?

Share This Page