BKL 4" Long Drop Compensated Dovetail Mount, 25.4 mm

• Drop-compensated base: The built-in 0.007" per inch compensation helps raise point of impact and preserves more of the scope’s internal elevation travel, which is especially useful on airguns and rimfire rifles that need extra upward adjustment.
• 4-inch unitized mount body: A long, one-piece clamping surface spreads recoil forces over more rail area, giving a more stable hold on spring-piston airguns, magnum airguns, and hard-used rimfire setups.
• Patented auto-centering clamp: BKL’s self-aligning clamping design keeps the mount centered on 11 mm and 3/8-inch dovetail rails as the screws are tightened, reducing the chance of side-loading the scope tube.
• Six-screw clamping system: The extended clamp with 6 dovetail clamp screws increases grip and security, helping the mount stay put on rifles that are more demanding on optics mounting hardware.
• 1-inch scope compatibility: Built for 25.4 mm (1 inch) scope tubes, this mount provides a straightforward solution for many classic hunting optics and rimfire or airgun scope combinations.

About the BKL 1 Inch Mounts Series

BKL 1 Inch Mounts, also known as the manufacturer’s 200 Series, are built for 1-inch scope tubes and standard 3/8-inch rimfire or 11 mm airgun dovetail rails. The series is aimed squarely at airgun and rimfire use, where rail dimensions can vary slightly and where a secure, centered fit matters just as much as raw clamping force. That is why the defining feature of the series is BKL’s patented auto-centering system, which moves the clamping legs equally as the screws are tightened so the mount stays aligned on the rail.

The range includes separate rings, unitized mounts, cantilever layouts, high versions, and drop-compensated variants, so the series covers everything from compact rimfire builds to rifles that need extra clearance or additional elevation correction. BKL also uses aircraft-grade aluminum alloy across the line, keeping weight reasonable while maintaining the rigidity needed for repeatable scope alignment. A practical detail shared across the series is the clamp-spreading feature, which allows the mount to be opened for easier installation on dovetail rails that run tight. In use, the series is known for simple mechanical design, broad compatibility, and a strong fit with traditional hunting optics and airgun scopes.

About the BKL 4" Long Drop Compensated Dovetail Mount, 25.4 mm

The BKL 4" Long Drop Compensated Dovetail Mount, 25.4 mm is a one-piece scope mount designed for shooters who need more holding surface and more usable elevation from a 1-inch riflescope. Its defining feature is the D7 drop compensation, which adds 0.007" per inch of built-in angle. In practice, that helps lift the scope’s line relative to the bore so the shooter can zero without using up as much internal elevation adjustment. That is particularly helpful on airguns and rimfire rifles, where scope travel can become a limiting factor at longer distances.

The mount uses a 4-inch clamp length and 6 dovetail clamp screws, giving it a broad, secure footprint on the rail. This long unitized layout supports the scope more evenly than short separate rings and is well suited to rifles that generate sharp movement, such as magnum spring-piston airguns, as well as semi-auto rimfire actions. The 24.60 mm BH height and 37.30 mm overall height place the optic at a practical level for many 1-inch scopes while still keeping the setup compact.

BKL’s auto-centering clamping system is a major part of the design. As the screws are tightened, the mount self-aligns on compatible dovetails, which helps maintain even tube support and reduces installation fuss. Finished in matte black and machined from aluminium, this mount is a practical choice for airgun mounts and scope mounts where secure dovetail fit and built-in elevation correction matter more than extra complexity.

About BKL Technologies

BKL Technologies originated in Brownsville, Texas, in 1998 and focuses on scope-mounting systems for airguns and rimfire rifles. The company built its reputation around a patented auto-centering clamping system designed to self-align as it is tightened, a design that addresses the small dimensional differences often found in 11 mm and 3/8-inch dovetail rails. That specialization has made BKL a familiar name among shooters who use traditional dovetail-equipped rifles rather than Picatinny-based platforms.

The company’s product range includes mounts, rings, adapters, risers, and scope levels, with its mounting components made from aircraft-grade aluminum alloy. BKL products are manufactured in Texas, United States, and the brand became part of Auto-Numatic Corp. in December 2008, when operations were moved to Fort Worth. In this category, BKL is known for straightforward mechanical solutions, strong compatibility with dovetail rails, and mount designs tailored to the specific needs of airgun and rimfire optics.

Main Features

• Manufacturer: BKL Technologies
• Series: BKL 1 Inch Mounts
• Made in: USA
• Mount type: Fixed dovetail mount
• Scope tube compatibility: 25.4 mm - 1"
• Tube diameter: 25.4
• BH height: 24.60 mm
• Overall height: 37.30 mm
• Extension: KR 0.0 mm
• Inclination: 0 MOA
• Windage adjustable: No
• Material: Aluminium
• Color: Matte

Warranty

2 years. BKL Technologies states a 2-year warranty for this mount, providing defined coverage for a fixed period rather than an open-ended policy.