Description Mount Lense protection keeps its optics safe from being hit by BBs. Transparent transparent acrylic lens mounts in front of its optics as a protective shield against BB balls and other types of debris. The bracket is quickly fixed to any picatinny rail without the use of any tool. For storage, the lens can be tilted to accommodate a smaller profile for transport and storage Features: • Large lens surface to protect a wide variety of optics • Easy to assemble • Includes two clear acrylic lenses • Fits all rails 20 mm / weaver / picatinny / accessory • Folding / folding function for transport and storage.