Butler Creek Flip-Open Objective Scope Cover, Size 39, 56.40mm

This Butler Creek Flip-Open Objective Scope Cover (Butler Creek part no. 30390) is a Size 39 cover, custom molded in black polymer to fit scopes with a 56.40mm 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 39 fit-chart listing, sized to a 56.40mm objective bell.
• Custom fit for a 56.40mm 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

Will this fit any scope with a similar-sized lens? It’s molded to Butler Creek’s Size 39 fit chart for a 56.40mm objective bell, so match your scope’s measurement to that figure before ordering.

Can I open it quickly when a shot presents itself? Yes, one touch of the thumb flips the lid open instantly, and the silent hinge won’t spook game or give away your position.

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 39, 56.40mm

A scope left uncovered in the truck or the field picks up dust and moisture fast, and this Butler Creek cover is built to stop that before it starts. 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.