BKL 4" Long Dovetail to Weaver/Picatinny Rimfire Adaptor Mount

• 4-inch adaptor platform: The long rail gives more room to position rings, red dots, or compact optics, which helps when balancing eye relief and accessory placement on rimfire and airgun setups.
• Dovetail to Weaver/Picatinny conversion: This mount lets rifles with 11 mm or 3/8-inch dovetails accept the broader range of Weaver and Picatinny-compatible optics and accessories.
• Auto-centering clamp design: BKL’s self-aligning system helps the mount stay centered on the rail as it is tightened, reducing setup frustration and promoting more consistent alignment.
• Aircraft-grade aluminum construction: The aluminum body keeps weight down while providing the rigidity needed for a stable optic interface on rimfire rifles and airguns.
• 0 MOA configuration: The flat, non-canted base preserves a neutral mounting angle, making it a practical choice for general-purpose optic installation without altering the rifle’s existing sight line.

About the BKL Riser Mounts Series

BKL Riser Mounts were developed to give rimfire and airgun shooters a practical way to expand mounting options on traditional dovetail-equipped rifles. Introduced with the Tri-Mount riser concept, the series raises the top rail by 0.68 inches, creating extra clearance for larger optics while also improving compatibility with accessories that need more space above the receiver. This makes the series especially useful on rifles where bolt clearance, objective bell clearance, or a more upright head position matters.

A defining feature of the series is BKL’s patented Auto-Centering technology, which is designed to self-align on 3/8-inch and 11 mm dovetail rails as the mount is tightened. In practical use, that helps simplify installation and maintain a centered fit on a wide range of rimfire and airgun actions. The series also stands out for its side dovetails, which add mounting points for accessories such as lights and lasers. Offered in several lengths and finishes, the BKL Riser Mounts family is built around the same idea throughout: turning a simple dovetail rail into a more versatile mounting platform without adding unnecessary bulk.

About the BKL 4" Long Dovetail to Weaver/Picatinny Rimfire Adaptor Mount

The BKL 4" Long Dovetail to Weaver/Picatinny Rimfire Adaptor Mount is built for shooters who want to fit Weaver- or Picatinny-compatible optics on a rifle that originally uses an 11 mm or 3/8-inch dovetail. That makes it especially relevant for rimfire rifles and airguns, where the factory rail often limits optic choice. By converting the receiver to a more common cross-slot format, this adaptor opens the door to a wider range of red dots, scope rings, and compact sighting systems.

Its 4" length is one of the model’s main practical advantages. The longer top section gives more freedom to place rings at the correct spacing and helps when mounting optics with less flexible tube length or when trying to fine-tune eye relief. On rifles used for target shooting, small-game hunting, or general range work, that extra mounting space can make setup noticeably easier.

The mount is made from aluminium and uses a 0 MOA profile, so it adds a stable, neutral interface without introducing cant. As part of BKL’s rimfire and airgun mounting system, it also benefits from the brand’s self-centering clamping approach, which is intended to align the mount evenly on the dovetail during installation. The result is a straightforward adaptor for shooters who need more optic compatibility while keeping the rifle’s original dovetail receiver in service.

About BKL Technologies

BKL Technologies originated in Brownsville, Texas, in 1998 and built its reputation around scope-mounting systems for airguns and rimfire rifles. The company focuses on mounts, rings, adapters, risers, and scope levels designed for the dovetail rails commonly found on these rifles. A key part of the brand’s identity is its patented auto-centering clamping system, developed to self-align as the mount is tightened and to fit both 11 mm and 3/8-inch dovetails.

BKL manufactures its products from aircraft-grade aluminum alloy and produces them in Texas, United States. In December 2008, Auto-Numatic Corp. acquired BKL Technologies and moved operations to Fort Worth, Texas. Within the shooting optics market, BKL is known for solving a specific problem well: giving rimfire and airgun shooters secure, adaptable mounting options for rifles that do not use standard centerfire-style bases.

Main Features

• Manufacturer: BKL Technologies
• Mount series: BKL Riser Mounts
• Made in: USA
• Mount type: Picatinny Rail
• Material: Aluminium
• Length: 102.00 mm
• Inclination: 0 MOA

Warranty

2 years. BKL Technologies states a 2-year warranty for this adaptor mount, providing defined coverage for manufacturing defects within the stated period.