This Butler Creek Flip-Open Eyepiece Scope Cover (Butler Creek part no. MO20050) is a Size 05 cover, custom molded in black polymer to fit scopes with a 1.43-inch (36.40mm) opening. Butler Creek built the line around a fast, silent, flip-open hinge, so a single push of the thumb clears the eyepiece 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 05 fit-chart listing, sized to a 1.43-inch (36.40mm) opening.
• Custom fit for a 1.43-inch (36.40mm) eyepiece, 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 eyepiece, 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 0.0313 lb, adding almost nothing to a scope’s overall weight.
• Cold-weather tested to -40 degrees F, holding up through genuine winter field conditions.
• The lid opens via an ergonomic, non-slip button, built for fast one-touch access even with gloves on.

Frequently Asked Questions

How do I know this is the right size for my scope? Butler Creek lists it as Size 05, built specifically for a 1.43-inch (36.40mm) opening on the eyepiece.

Does the cover make noise when it opens? No, Butler Creek built the hinge to operate silently, which matters when you’re glassing game at close range.

Does the cover seal out moisture? Yes, it forms a watertight, airtight seal over the eyepiece and has been tested to -40 degrees F for cold-weather reliability.

Buy the Butler Creek Flip-Open Eyepiece Scope Cover, Size 05, 1.43 in.

Keeping a scope’s glass clean and dry between shots is a small detail that pays off the moment weather turns, and this Size 05 Flip-Open cover handles it without adding bulk. 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.