1911 Mainspring Housing Spring Retainer – Government Commander Officer

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Auto Pistol Parts: 1911 Mainspring Housing Spring Retainer

NOS with no notable blemishes – Please review the photos closely for condition and to ensure that this part is correct for your model.

The mainspring housing pin retainer (retainer cap) is a GI‑standard component used across nearly all 1911 and 1911‑pattern pistols. True compatibility exceptions are uncommon and mainly limited to integrated lock systems such as Springfield’s ILS, which alter the cap and spring but still maintain the GI‑spec retainer pin bore and seat geometry. Because most manufacturers follow the original Colt dimensions, the retainer cap remains universally interchangeable with standard GI‑spec housings across the platform.

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