Vision's Modular Flat Top for the Standard Forend is an addition to the standard forend that encloses the entire forend. The modular top cover is compatible with Picatinny rails using our "Universal Top Cover Picatinny Rail", allowing you to mount night vision devices and other accessories to suit your needs. As with all our products, this one comes with black stainless steel torx head screws, so you don't have to worry about corrosion.