Butler Creek Flip-Open Objective Scope Cover, Size 51, 65.40mm

This Butler Creek Flip-Open Objective Scope Cover (Butler Creek part no. 30510) is a Size 51 cover, custom molded in black polymer to fit scopes with a 65.40mm objective bell. Butler Creek built the line around a fast, silent, flip-open hinge, so a single push of the thumb clears the objective lens for a shot without a fumbled cap costing you the moment. The cover forms a watertight, airtight seal over the glass between uses, keeping out rain, snow, and dust on a long day afield. It’s a small, low-cost accessory that solves a real problem for anyone running a scope outside a climate-controlled range.

Key Specifications

• Molded as Butler Creek’s Size 51 fit-chart listing, sized to a 65.40mm objective bell.
• Custom fit for a 65.40mm objective bell, matching the scope’s own measurement rather than a generic universal size.
• Molded from black polymer for a durable, lightweight cover that won’t rust or corrode.
• Uses a slip-on mounting style, no tools or adhesive needed to install or remove it.
• Forms a watertight, airtight seal over the objective lens, keeping rain, snow, and dust off the glass.
• Opens with a single touch of the thumb via a spring-loaded, flip-open lid.
• The hinge operates silently, so opening the cover won’t spook game or give away your position.
• Ships at a featherlight 0.1 lb, adding almost nothing to a scope’s overall weight.
• Cold-weather tested to -40 degrees F, holding up through genuine winter field conditions.
• Butler Creek builds these to a fit tolerance of 0.01 inch under to 0.025 inch over the listed measurement, so the seal stays snug.

Frequently Asked Questions

What size scope does this cover fit? It’s Butler Creek’s Size 51 listing, custom molded for a objective lens with a 65.40mm objective bell.

How does the flip-open design work? A single touch of your thumb releases the spring-loaded lid, and the hinge is silent so it won’t alert game or draw attention.

Will this keep water and dirt off my lens? Yes, it forms a watertight, airtight seal over the lens and has been cold-tested to -40 degrees F.

Buy the Butler Creek Flip-Open Objective Scope Cover, Size 51, 65.40mm

A torn or missing scope cover leaves the glass exposed to exactly the kind of weather that ruins a hunt, and this Butler Creek Size 51 cover is a cheap, purpose-built fix. Order it from our Butler Creek lineup, part of our full selection of scope accessories and parts, from our Lubbock, Texas gun shop, and it ships fast to your door.