Ibanez 2BB1MR4K Mono-Rail IV Bass Bridge – Cosmo Black

The Ibanez 2BB1MR4K is a genuine Mono-Rail IV (MR-4) fixed bass bridge finished in Cosmo Black. This individual bridge unit is designed to support a single bass string, allowing each string to sit on its own independently mounted bridge component. 

The Mono-Rail IV design helps isolate each string from the others, allowing string vibration to transfer directly into the instrument body while reducing interaction between adjacent strings. Each saddle is independently secured, with height adjustment controlled by a dedicated screw.

Individual Mono-Rail Design

Unlike a conventional multi-string bridge plate, the MR-4 uses an individual bridge unit for each string. This allows each string position to be mounted and adjusted independently for precise setup and string isolation.

Adjustable Saddle

The saddle is independently locked to the body, while a dedicated adjustment screw controls saddle height. This provides straightforward setup flexibility for compatible Ibanez basses using the Mono-Rail IV system.

Features

• Genuine Ibanez replacement bass bridge
• Mono-Rail IV / MR-4 design
• Individual single-string bridge unit
• Fixed bridge construction
• Cosmo Black finish
• Independently mounted saddle
• Adjustable saddle height
• Designed for compatible Ibanez bass guitars
• Sold as one bridge unit

Specifications