1. Tube diameter: 30mm
1. Fit on 21mm picatinny rail with quick release and fasten.
3. Made in High quality aluminum alloy with durable black matte finish.
4. Shockproof can be used on real fire.
5. High quality with competitive price
We offer the most complete line of professional scope mounts for your rifles. All the mounts are constructed of aluminum and black matte finish. Picatinney design for more diverse mounting options and easy installation. All mounts are designed for ease of use and lasting strength. More products, please visit our company website, Http://www.dontop.com