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Help With 1911


joachim slim

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I bought a Rock Island 1911 45acp from a friend. He says its a Commander and I say its an Officers model. It does have a 3 1/2" barrel. The real question is the grip panels. The ones on it measure 2 3/4" from center hole to center hole. Anyone have any ideas?

 

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Just measured the grip panels from a gov't model (same as commander, right?) at 4 1/8".

Ooops, I held the tape at 1", so should read 3 1/8", just about what Mr. Kloehr said:blush:

The differences between Colt 1911 Models in .45 ACP:

  • Government: 5-inch barrel, 8+1 capacity (originally 7+1).
  • Commander: 4.25-inch barrel, 8+1 capacity.
  • Officer: 3.5-inch barrel, 6 and 7+1 capacity.
  • Defender: 3-inch barrel, 7+1 capacity.
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3.074 +/- 0.005" for Government (all full-size including Commander). This is the published specification.

Some makers use 3.0625. Generally, these grips and per-spec grips are interchangeable.

 

Compacts (including Commander) are roughly 2.6875 center to center on grip screws. I must say "roughly" because Colt never published the specification.

 

Even them the 3.074" is actually a calculated distance as the specification calls out X and Y offsets, not the actual distance. So the "distance" comes from applying the Pythagorean Theorem using the other two sides of the triangle.

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Sorry John, but the Commander has the full grip length frame as the 5" Gov't Model.

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