The Butler Creek Element Flip Open Objective 50-55mm (Size 56) is a modular protective riflescope lens cap engineered to fit objective bell outer diameters measuring between 50 mm and 55 mm (1.97 in to 2.20 in). Constructed with a rugged polymer lid, a flexible rubber multi-flex collar, and stainless steel hardware, it establishes a tight physical barrier against dust, moisture, and impact. The cap incorporates a dual-position hinge that locks upright at 180° or folds back flat at 270° against the scope body, maintaining a clear field of view during shooting. It features an interchangeable disk system containing three user-swappable inserts: a black solid disk for glare protection, a clear optical disk for target acquisition through foul weather, and a ballistic data disk for caliber-specific dope charts.

Key Features

• Modular Interchangeable Disk System: Includes a solid black disk to block sunlight and prevent glare, a transparent disk for rapid reticle sighting in rain or dust, and a customizable ballistic data disk for holding printed elevation and windage holdover charts.
• Dual-Position Hinge: Folds open to a stable 180° upright position or pins back flat at 270° parallel to the optic tube to prevent sight picture obstruction.
• Weather-Sealed Multi-Flex Collar: Flexible rubber sleeve stretches over the objective bell to create a tight friction seal against water, grit, and fine dust.
• Rugged Mechanical Construction: Fully mechanical, passive design combining impact-resistant polymer and corrosion-resistant stainless steel pins for long-term field durability without power requirements.

Product Specifications

• Fitment Range: Objective outer bell diameter of 50 mm to 55 mm (1.97 in to 2.20 in)
• Sizing Designation: Size 56
• Weight: Under 50 g installed (packaged weight approximately 120 g to 138 g / 0.27 to 0.30 lbs)
• Materials: Polymer lid, stretchable rubber collar, stainless steel hinge hardware
• Included Inserts: Solid Black Protective Disk, Clear Optical Lens Disk, Printable Ballistic Data Disk
• Hinge Opening Angles: 180° and 270° positions

Who is the Butler Creek Element Flip Open Objective 50-55mm for?

• Long-range precision rifle shooters — provides a dedicated ballistic dope window right on the flip-open riflescope objective cap to read custom drop charts quickly without breaking position on optics with a 50 mm to 55 mm outer objective bell.
• Australian outback pest control hunters — utilizes a flexible multi-flex rubber seal that locks fine red dust and moisture out of 50 mm to 55 mm scope housings, while the clear lens disk allows immediate target engagement without opening the cover.
• Tactical marksmen — incorporates a dual-detent hinge that folds back completely flat to 270° along 1.97 in to 2.20 in scope housings, preventing the cap from snagging on gear or obstructing peripheral vision during rapid target transitions.

Less suitable for: Scopes with an outer objective bell housing smaller than 50 mm or larger than 55 mm, which require smaller or larger alternative sizing variants within the flip-open scope cap range.