Marble Arms No. 66 Dovetail Flat-Top Rear Sight, Long Shank

The Marble Arms No. 66 Flat-Top Dovetail Rear Sight in black (Marble Arms part no. 006600) is a long-shank replacement rear sight for rifles with a standard factory dovetail-cut sight base. Marble Arms has produced American sporting rifle sights since the early 1900s, and the 66 pattern keeps the same clean, flat-top notch profile that hunters favor for a fast sight picture in the field. The long shank sits the sight body higher above the barrel than the short-shank 63H pattern, suiting barrels that need extra sight height. Its black finish keeps glare down and matches most factory rifle finishes.

Key Specifications

• The dovetail base drops into a standard factory-cut dovetail slot without additional machining.
• The flat-top notch profile gives a clean, fast sight picture over a notched or buckhorn design.
• A long shank sits the sight body higher above the barrel, suiting rifles that need extra sight height.
• The black finish cuts glare and matches most factory rifle finishes.

Frequently Asked Questions

How is this different from the 63H sight? The 66 pattern uses a long shank that sits the sight body higher above the barrel, while the 63H uses a short shank that sits lower; both share the same flat-top notch profile.

Does this sight fit any dovetail slot? It is sized for a standard factory dovetail cut, but dovetail width varies by rifle model, so confirm your barrel’s dovetail width before ordering.

Buy the Marble Arms No. 66 Dovetail Flat-Top Rear Sight

Order the Marble Arms No. 66 Flat-Top Dovetail Rear Sight from Marble Arms through our rifle parts selection and restore proper sight height to your rifle. Our Lubbock, Texas team can help confirm dovetail fitment before you order.